375 H&H vs 300 H&H

[IvW]

Here is the senario.
I own 2 375 H&H rifle both on Brno ZKK 602 actions with pop up peep sights in the receiver.
Converting one to 300 H&H will be a pain in the arse.....

I am thinking using the original one with longer barrel with 270gr premium bullets in 270gr for longer range work(2700fps) max 300 meters and the custom 24" barrel one with 340gr bullets(2300fps) for bushveldt hunting.....

Bear in mind I eat what I hunt and with our stringent gun laws rebarreling to 300 H&H as mentioned will be apain in the arse...

This will be for larger pg species and for the smaller ones I will stick to 7x57mm...

 

[Wyatt Smith]

I don’t think a 300 will be enough of a step up in performance from the 7x57 to worry about, especially since you would be converting a good 375.

 

[BeeMaa]

Here is a thread on the 300H&H vs 7x57mm to compare energy levels and velocity.

https://www.africahunting.com/threads/chronographed-7x57-and-300-h-h-loads.31209/

Why would you trade a rifle of good accuracy and reliability to trade for a pain in the arse paperwork and unknown accuracy? Couldn't you sell it to fund the drilling you are always talking about?

 

[IvW]

This is rather 375 vs 300 H&H....
Driling is not 300 meter good choice and means a new licence I have 17 firearms so pushing the limits in that department...
I need to know if one of my 375 can do the longer 300 meter work on larger plains game....
My research sais the 375 should do the job....

 

[IvW]

A drilling is a shorter range woods or bush proposition.....

I need to figure out if I can use one of my 375 for longer range work succesfully without going through the burocrating bullshit we have to deal with here..

 

[IvW]

I would basically like to find out if anyody is using a 375 H&H for longer range work out to 300 meters and how succesful they have been.
Both my 375 are licenced so that simplifies matters on this end

 

[machinistbutler]

I have used one of mine for 300 meter shooting a fair bit. I use the 260 accubonds in mine, accuracy is fantastic and it still hits hard at that range. I dont think 300 stretches its legs at all. What is the twist rate on the 375 you use the 340 gr bullets on?


I don't think you can have too many 375 H&H

 

[Wyatt Smith]

The ballistics charts in the back of my reloading manual shows me that,
A 375 H&H loaded with 270 A frames at 2700 will drop 9.5” at 300 yards on a 200 zero.
A 300 H&H loaded with 200 grain A frames loaded to 2700 will drop 8.6 “ at 300 yards with a 200 yard zero.

 

[Wyatt Smith]

Sorry for being a bureaucrat.

 

[IvW]

The ballistics charts in the back of my reloading manual shows me that,
A 375 H&H loaded with 270 A frames at 2700 will drop 9.5” at 300 yards on a 200 zero.
A 300 H&H loaded with 200 grain A frames loaded to 2700 will drop 8.6 “ at 300 yards with a 200 yard zero.

So less than an inch at 300 I can live with that...or get closer....

 

[375er]

Load up the .375 and go hunting. No worries on that cartridge!

 

[IvW]

I have used one of mine for 300 meter shooting a fair bit. I use the 260 accubonds in mine, accuracy is fantastic and it still hits hard at that range. I dont think 300 stretches its legs at all. What is the twist rate on the 375 you use the 340 gr bullets on?


I don't think you can have too

1 in 10

 

[machinistbutler]

Perfect ! I have one with that twist, haven't used it much yet but have a bunch of 350 grain woodleighs to use in it.

 

[Wyatt Smith]

If you know the ballistic coefficient for any bullet I can look at the charts for you. They go to 500 yards, have the option for 100, 200, or 300 yard zero. And show the velocity at range.

 

[IvW]

Perfect ! I have one with that twist, haven't used it much yet but have a bunch of 350 grain woodleighs to use in it.

This one also handles 380gr Rhinos with no issues

 

[IvW]

If you know the ballistic coefficient for any bullet I can look at the charts for you. They go to 500 yards, have the option for 100, 200, or 300 yard zero. And show the velocity at range.

Will check that for the bullets intend to use

 

[IvW]

SD .274
BC .45
270 gr Rhino

 

[IvW]

Max I need is 330 yards

 

[Hunter4752001]

I had been considering a similar project. Unfortunately, while BRNO made a 602 in 300 Win Mag, they didn't make one in 300 H&H (at least not a production run). However just before they discontinued the CZ550, CZ (Europe) release some in 300 H&H, which means they made barrels of the 602/550 design. I contacted our local CZ agent but they weren't in the least interested in importing either a rifle or a barrel.

Putting that aside, I can't see any reason why the 375 wouldn't work at 300 M. The rifles are plenty accurate enough, and there are a few high BC bullets out there. Load up a few and test it out. Much less paperwork than dealing with your bureaucrats.

 

[Wyatt Smith]

The BC on the 270 grain swift was .44 I guess it will be 1/2 inch flatter at .45