Custom 550 Magnum

GAH! Look at that transition from the receiver to the barrel. I can’t see it on my screen. Beautiful piece.
Still chuckling over “…9 pieces of brass”!
 
This is one of the only calibers that blackened my shoulder! Second shot with it on moving speed target and it HUUUUURT! Im not recoil sensitive, AT ALL and it punished me! Shoot this in a weighted sled until you have to shoot it standing and never shoot it off bags! I dont remember bullet weight on his loads but if i remember correctly they were bigger then standard 50 BMG bullet weights???
Anyway, bump for beautiful rifle!
 
This is one of the only calibers that blackened my shoulder! Second shot with it on moving speed target and it HUUUUURT! Im not recoil sensitive, AT ALL and it punished me! Shoot this in a weighted sled until you have to shoot it standing and never shoot it off bags! I dont remember bullet weight on his loads but if i remember correctly they were bigger then standard 50 BMG bullet weights???
Anyway, bump for beautiful rifle!
I think they are 700 grain.
 
This is one of the only calibers that blackened my shoulder! Second shot with it on moving speed target and it HUUUUURT! Im not recoil sensitive, AT ALL and it punished me! Shoot this in a weighted sled until you have to shoot it standing and never shoot it off bags! I dont remember bullet weight on his loads but if i remember correctly they were bigger then standard 50 BMG bullet weights???
Anyway, bump for beautiful rifle!
Shooting this in a weighted sled may be easier on your shoulder, but it's harder on the rifle stock. For every action, there is an equal and opposite reaction. Physics can not be denied and a cracked rifle stock is harder to recover from than a bruised shoulder.

I'd highly recommend using a PAST recoil pad and sighting this rifle in from sticks. Preferably a set of quad sticks, but something other than the bench. For the distances and accuracy required for this caliber, it should do the job nicely.
I think they are 700 grain.
FYI - 700 grains at 2400 fps is nearly 9000 lb-ft of energy! :oops:
 
@Flewis It is wby. The brass is longer than the wby. Hard to find. Have MRC actions. Might build a 550-505 on it.
Krish
The 3inch, maybe it will come to me who made it. Might be the best way. Can you set the barrel back? I do like the 505 version better. Frank.
 
Do you have a 505 version ?
Krish
No, it just makes more sense to me. You stay off the high pressure edge that way. The biggest i have is a 585 2:75inch and needs a new stock.
 
Being a straight wall case would that be like a 458wm in lott chamber?
 
No. I have not.
Krish
I spent part of a day in ca with a guy who may be or had something with the beginning of mrc. At that time it was just the actions for sale. That failed sometime in the early 90s. It seems to me they were built off shore some where. It may have also have been in the late 80s. I guess I need to check the history. What area are you from now not before.
 

Forum statistics

Threads
65,450
Messages
1,444,722
Members
136,104
Latest member
LuisHaszle
 

 

 

Latest profile posts

Made it to Augusta Georgia yesterday for a meeting, hunt bookings are looking good for 2026 and 2027, had a great time on our Alabama safari shot a rutting deer at 200 yards with 7mm PRC near Huntsville and then headed on to Butler Alabama and semi guided my first deer ever shot a very nice broken off 8 point with hunter there and spend a few days on 1100 acres hunting preserve awesome place!
Ray B wrote on JMJ888's profile.
I am righthanded, so not interested in the rifle, but I have a 375 RUM and 350 gr bullet loading data is very hard to come by. If you could reply with information regarding your loads I would greatly appreciate it. Thank you, Ray Boone, Leavenworth, WA
mcr wrote on gbflyer's profile.
Hello - I was looking at your post from several years ago regarding the Winchester 300 H&H. Any chance you still have the lefty M70 300 H&H for sale?
Thank you, Mike
'68boy wrote on Rare Breed's profile.
Wife and I will attend ah dinner in Nashville Friday night. Jay Sheets and wife Chris
crossfire3006 wrote on Hornedfrogbbq's profile.
An excellent AH member right here! I had a fantastic transaction with Hornedfrogbbq (I was the seller). His communication was first rate, payment was extremely fast, and I would have absolutely no reservations at all dealing with him again. Thank you, F!
 
Top