Thoughts on the use of a Pederzoli Kodiak .50 sxs muzzle loader : 370gn Maxi-balls for plains game hunting?

Fo
What was the original question again……
(That’s a joke just in case)
Gert, in amongst all the other stuff, you sort of have an answer. I , personally with time permitting, would get some maxi slugs and some round ball ( 20-30 of each would be more than enough ) and try shooting them into a semi soft media like old phone books (can people still get them?) or newspapers, magazines etc that have been soaked in water till sodden, and see which penetrates the best for your intended game animal. Using a different powder charge for each couple of shots with each different projectile, first shot to see where it hits, second for the target to test expansion and penetration. This seems like a lot of work, but it is probably the best method to see what your particular firearm likes. You can be lucky and find the best choice straight away, then load up ten or so of that combination and shoot for point of aim.
And to clarify another question, the 10.15 Mauser is the 43 Mauser cartridge, which is a nice round.
Gumpy

For sure , I will do that in the near future..my focus now is on getting a load that is accurate at 50 meters to 80 meters on warthogs for the upcoming hunt in twee weeks
 
Grumpy gumpy- good advice. It’s easy enough, but time consuming, to test projectiles in a media that more or less simulates tissue. I found that what some call “wet pack” correlates pretty well with what can be expected in the field. I built a plywood trough about 4 ft long that would hold bundles of phone books or other similar paper. I make the bundles 6-8 inches thick and tie each bundle with nylon string. I soak the bundles in water for at least a couple of hours or until 100% saturated. Stack them in the trough and shoot. Between bundle #1 and 2, I place a 1 1/2 inch piece of hardwood to simulate bone. I carefully align the shot axis to the axis of the trough. Then bundle by bundle, I reveal the bullet track and take note of wound channel, bullet track, depth of penetration and attitude of bullet at terminus. I reduce load so impact velocity matches about that of an average 50-100 yard shot or whatever distance the test is supposed to simulate. Do it the same for every test and you can legitimately compare performance among different projectiles at their normal impact velocities. Pain in the rear and time consuming but one of the few ways I know of to make valid bullet performance comparisons. I believe @michael458, who has done more bullet testing than anyone here, uses a similar method. Another test media of course is ballistic gelatin with actual bone imbedded. No matter the test, media has to be replaced after each shot.
 
Do it the same for every test and you can legitimately compare performance among different projectiles at their normal impact velocities. Pain in the rear and time consuming but one of the few ways I know of to make valid bullet performance comparisons
@fourfive8 you are 100% correct, I concur. I use a bit different mix, but the results are the same. What we find in this test medium is that bullet behavior is exactly the same in the test mix as it is in animal tissue, I have literally 100s of different bullets to make direct comparisons. What you get in the Test Medium, you will get in Animal tissue. Animal tissue has some variables that come into play, bone for example, and one can even simulate that to an extent in the test medium.

My mix is a little different, in my early years of testing I used straight wet news print. A few years later, my wife was getting 3-5 inches of catalogs and magazines A DAY! I was thinking, I need to make some use of this material, instead of the trash? I started experimenting some with it, against known bullets, and I found out somewhat by accident by adding this into the mix, it made it much tougher than straight wet news print. My mix ended up being roughly 10 inches of wet news print, a layer of catalogs/magazines 1.5-2 inches thick... and repeat for every 10 inches of wet news print through the mix. This medium showed to be about 30%--35% more dense and tough on bullets than straight wet news print in direct comparisons. Since I was receiving so much of this, and it did make it a little tougher on the bullets, I stuck with this mix for the last 20-25 years of testing. It is and has been a standard here for a very long time, and many 1000s of tests.......

When I built the Indoor Range, in the back I had one box built, water piped in, and a drain put in the floor as well. We were set to do proper test work. The box was put on wheels so I could move it around. When we started design and test work on the various CEB and NF Solids, I soon found out that one 65 inch deep box was not enough, I had to have another built to catch any solids that penetrated beyond 65 inches. So I have two boxes, and testing proper designed solids I put them together.

DSC04283-X2.jpg


With any expanding or trauma inflicting bullet, one box is more than enough........

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I will put a box together, then start soaking it several times a day for at least a couple of days to make sure it is thoroughly wet through and through. Only Aqueous Medium is valid. Animals are aqueous.

The one thing that does not equate is depth of penetration. The Test Mix is far more dense than animal tissue. I have shot enough over the years to develop a few "Rules of Thumb", not absolute, but simple rules of thumb. With common expanding bullets you can expect 50% to 70% more penetration in animal tissue than test medium. Trauma inflicting Generation 1 and Generation II bullets... Such as Hammers and CEB Maximus Gen 1, and Raptors being Gen II, you can look to get double the depth of penetration in animal tissue. Solids are different, you will get on average 35% more penetration in animal tissue than the test medium. This applies to my test medium only. Mileage will vary in others....... depending on the density of the medium.

Another test media of course is ballistic gelatin with actual bone imbedded. No matter the test, media has to be replaced after each shot.
Ballistic gel is fine for testing handgun bullets and such. But when you move to big bore rifle bullets, not so good. And Solids? forget about it, you need 10 ft or more to catch some of these. And, have to be replaced as @fourfive8 says after each shot. You would NEVER get enough done to be worthwhile.

We don't test as much as we used to, but back in the day we were going through literally TONS of Wet Print. I used to have a deal with the local newspaper, and would go load up 3-4 tons dry at a time, I paid $0.10 per lb at the time. Same price they got to recycle.

Pain in the rear and time consuming but one of the few ways I know of to make valid bullet performance comparisons.
Indeed, it is a lot of work. I was fortunate to have a test partner that was just as nuts and anal about doing things right as I was and it made a big difference with two of you going at it. But at the end of the day, we were totally wiped out...........

All of the test work can be a drain on your system, load data and pressure data is not quite as physical as wrestling wet print, but it is also rather demanding. Regardless, you learn so much by doing these things it is extremely enlightening. And you learn something new every time. Which is indeed rewarding.

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Sorry guys, I don't even know what this thread is about?? I just noticed my name was invoked and the subject being test work.......... and off I go..........
 
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I may have opened a (interesting) proverbial box of worms…..
I was thinking more of the OP just shooting a stack of wet paper in a wooden box to see which lead projectiles were going to be the best option for him, re penetration and mushrooming
Gumpy
 
I did mention and upload photos of the Pedersoli SxS .50 cal where I am replacing the v- express sights on the muzzle loader wit a Leyman rear tang ghost ring sight ..I am sure I will get better accuracy with the ghost ring sight.

I fit the Leyman ghost ring sight to the Pedersoli today...tomorrow will find me shooting a few groups just to see what difference the ghost ring sight will do in regards to accuracy out to 25 meters and 50 meters.. Will give feedback ...

I moved the ghost ring sight down to the last screw and drill a hole in the wood to fasten the ghost ring as tight as possible ..The ghost ring stem is currently adjusted to the lowest height and there are a lot extra height available to adjust ...



ghost ring ap.jpg
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Those are fun rifles to shoot .I have double ecpress sites on mine and double small primer adapters on it .It goes off instantly .It shoots 1.5 inches at 76 yards
dg416, thank you for your input it is much appreciated.. I currently have the TOP HAT nipples on the Kodiak..I am considering re-placing it with the nr 11 nipples...the large TOP HAT nipples , especially the left side nipple has a large blow out of gas when igniting..in such an extend that I have to wear a glove when shooting it....

I am using ZAR black powder, a high quality black powder, so I do not think the nr11 nipples will have a delayed when firing ....
 
Members, are there anyone who use these type of bullets /sabots in their .50 cal muzzle loader Pedersoli SXS rifles??
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I used mostly 200 to 240 gr 44 mag hp bullet .The maxium was 100 grains for that rifle with my primer adapters .It was a 125 maxium range rifle with the adjustible double site express sites .I think a 1x5 scope might be better but 1.5 inches with both barrels 6 shots at 75 yards is awesome .
 
I commenced shooting the Pedersoli .50cal SxS Muzzle loader after I fit a Ghost ring aperture sight. I removed the original V-express sights..my aging eyes really do not work with the V-express sights .

Step 1: I sorted out a accuracy measuring technique use by black powder muzzle loader hunters..the old flask method...not accurate at all ....

Did some measuring exercises and found the 8X68 S case to be exactly 80gn of FFFG ZAR black powder.
WhatsApp Image 2026-09-11 at 11.49.07 AM 8x68S measuring vesel.jpeg
WhatsApp Image 2026-09-11 at 11.53.44 AM Measuring 8x68S 80gn FFFG ZAR black powder.jpeg
Filling the old medicine containers with ZAR black powder makes for an effortless charging technique.

STEP 2: Using a Measuring instrument /vernier to determine height of ghost ring
WhatsApp Image 2026-09-11 at 12.18.31 PM Ghost ring measurments heights.jpeg
WhatsApp Image 2026-09-11 at 12.28.07 PM.jpeg
I used the vernier to measure precisely the height of the ghost ring in relation to the impact on the target. I observed how even two mm can make a difference on the target and accuracy.Weight of bullets are not that much critical to the printing of the bullets on the targets ...

Adjusting the height of the ghost ring impact at different heights over 25m to 50 meters

WhatsApp Image 2026-09-11 at 1.52.08 PM 50 meter ghost ring height adjustment.jpeg
WhatsApp Image 2026-09-11 at 12.29.15 PM Ghost ring height adjustment results.jpeg
WhatsApp Image 2026-09-11 at 1.51.55 PM Height adjustment result 2.jpeg

Some results :
I still have to shoot some MAXI BALL cast bullets and cast bullets I am casting myself ..
WhatsApp Image 2026-09-11 at 2.59.50 PM Ghost ring adjusting Green skirt sabbot type bullets ...jpeg


Will be shooting again next week..I need to get this load sorted out for the wart hog hunt coming up end of September ..

Conclusion:
The Ghost ring aperture sight is working well with my eyes..I really like shooting my Pedersoli SxS ..it is a great rifle and I will be able to get it to shooting very accurate .
 
If you want to tighten the groups you could try using more powder. I found my Pedersoli 1:24” twist barrel liked 110-120 grains of 2F to push a 250grain hornady monoflex into reasonable groups.
 
My sxs .50 maxed out at 100 grains with primer adaptes .The cap can blow off above that om the primer adapters .I guess I will have to get mine out to hunt with again .My olny problem was cleaning bp and keepng it from rusting after I cleaned it .I have two of the sxs .50 the other one is the cva express rifle .It shot way better with the express sites too .
 
My sxs .50 maxed out at 100 grains with primer adaptes .The cap can blow off above that om the primer adapters .I guess I will have to get mine out to hunt with again .My olny problem was cleaning bp and keepng it from rusting after I cleaned it .I have two of the sxs .50 the other one is the cva express rifle .It shot way better with the express sites too .
Were you using 10’s or 11’s? what kind of fit are you getting? If they’re not snug they’re more likely to blow off too.

For a hooked breech just stick the breech end in warm soapy water and suck it up by moving the cleaning rod up and down. After you’ve dried the bore give it a good lick of barricade and you shouldn’t have issues with rust.
 
I've been shooting ML's since 1972, 1960 if you include the little cannons we made as kids.
ALL of my ML 's come apart to be cleaned. Nipples get removed and the breeches are stuck in tepid(cool) water. No soap is needed according to Holland and Holland's written instructions to my late friend Wil Thompson back in the mid 1970's on leaning his 5 bore SxS. Since then all I have used was cold tap water. It works. I've never rusted a bore after cleaning. When using hot water before, I got flash rusting every time. THAT is accumulative. Dry the bore after flushing, with clean dry cloth patches. I used doubled flannellette and size the jag to use the doubled cloth, pumping water into, then forcably pushing it out, in and out, in and out at least 10 times. If you use "weak" ball and patch combos, or slugs it may take longer. Then when clean, dry it with more clean patches. Then liberally spray the interior down muzzle with a water displacing oil like WD40 until it runs out the vent or nipple seat. Then forceably patch that out with 2 more patches. Use a wet WD40 patch to wipe down the outside of the barrel, replace the nipples after cleaning & blowing through them from the top. Then replace the barrel(s) onto the stock.
In humid conditions, a better oil might be needed for storage than WD40. That works here with av. humidity of 50%.
Cleaning a ML barrel(s) does not take as long as cleaning a smokeless pdr. rifle PROPERLY. Most smokeless rifle barrels need 2 soaks with a copper solvent. Each "soak" takes 15min. Then a patch with light gun oil or Ed's Red should be run through the barrel. Cleaning a ML barrel(s) should not take more than 10 min. just as I have described it.
NO RUST, EVER!
If you use a phony black powder, all bets are off. If it contains CHORATES, or PERCHLORATES, the fouling, with some moisture, like from the air, turns to a corrosive almost as bad as a weak acid. It have an affinity for iron molecules.
 
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I’ve read about the “flash rust” theory for years. :):) Stating no flash rust after cold water only cleaning yada yada yada. The chemistry of that theory escapes me. As does the aversion to using soap for cleaning a bp gun. I’ve been shooting blackpowder muzzleloaders since 1968, have used hot soapy water followed by hot rinse water followed by several dry, clean patches while barrel is still hot followed by aerorsol spray oil like WD .., etc. After that method, bores are completely void of powder residue and void of moisture and are protected by thin oil film so no flash rust (whatever that is?) and no rust of any kind over time when put in storage.

Some of the worst, sewer pipe bores I’ve ever looked at were a result of users’ poor/lazy cleaning habits after shooting subs like Pyrodex. I tried Pyrodex a few times when it first came out (about 1977) and still have the remainder of the 1/2 full cardboard can it came in. Hard fouling, super corrosive with zero advantage over real bp. If you use a bp sub like Pyrodex, be aware of the potentials. :):)
 

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