Today I was shooting a new 375 H&H Magnum I recently acquired. Obviously, more scope adjustment is needed but I didn't think this was too bad for my first range session with cartridges I had loaded up for another gun.

Maybe this will be my new groundhog gun.

There was one error. The bullet is a BTSP (boat-tailed Spire Point).

Nice group. Curious, what velocity are you getting? I am loading 70+ grains (I think it is 71-72 grains, but I am not sure) of RL15 in my .375 H&H to get 2400 fps with 300 grain TSXs.

I am loading 71 grains of Reloader 15 with 300 grain Barnes triple shocks, FC brass, CCI magnum primers. Mine average 2694 fps in my Win M70 Classic Stainless and it is shooting groups like Grumulkin's except 2" high of the bull at 100 yards. I substitute 300 grain Nosler Partitions in that load and the groups open up just over an inch and higher than the Barnes groups.
I love this rifle it is very accurate, I know this load is fast but it is safe in my rifle but use caution in yours.

Interesting. My load is 71 grains of RL15, a Federal 215M primer, new Hornady brass, and 300 grains Barnes TSX in a standard stainless Winchester M70 Classic. I get 2470 fps. That is a difference of more than 200 fps with just different brass and primers. I know the lots of RL15 vary widely but that is a big variation.

quote:

Originally posted by MJines:
Nice group. Curious, what velocity are you getting?

I don't know the velocity since I haven't gotten the chronograph out for this one yet. I used loads I had worked up for another 375 H&H Mag. and my criteria wasn't velocity but accuracy so that's how I arrived at 65 grains.

quote:

Originally posted by MJines:
Interesting. My load is 71 grains of RL15, a Federal 215M primer, new Hornady brass, and 300 grains Barnes TSX in a standard stainless Winchester M70 Classic. I get 2470 fps. That is a difference of more than 200 fps with just different brass and primers. I know the lots of RL15 vary widely but that is a big variation.

Yes I know that is a smokin' fast load in my rifle, I guess this rifle is just fast I have plenty of other rifles that I can't get close to published velocities before I hit max. I pushed up to 73 grains of RL 15 but backed down to where the accuracy was then I chronied that load and 2694 is my average. Extreme spread was 36 over the last 10 shots.
I've been told before I was full of it and that speed is impossible but my chrony keeps putting out the numbers so I'm very sure it is accurate.

I've got a fast barreled M70 375H&H as well. I think I posted something about this load on another thread just the other day. I'm sitting here with my load book now, so here are the particulars:

Both loads are Rem. cases, Reloader 15, 300gr. TSX and crimped with a Lee Factory Crimp die. Only variable was the primer.

CCI Large Mag Primer
70gr - 2613
71gr - 2676
72gr - 2736

Fed 215
70gr - 2599
71gr - 2611
72gr - 2665

These were one shot each, starting 2 grains below and working to max book loads watching for pressure signs. The chrony was +/- 10 feet from the muzzle. I was a little baffled when I saw the numbers. I shot the CCI loads first, then a couple weeks later the Fed. 215 load. If they hadn't read so close together, I'd be more skeptical.

By the way, Grumulkin, great shooting! Looks like you've got a winner with no real work. Consider yourself lucky.

David

quote:

Originally posted by Grumulkin:
Today I was shooting a new 375 H&H Magnum I recently acquired. Obviously, more scope adjustment is needed but I didn't think this was too bad for my first range session with cartridges I had loaded up for another gun.

Maybe this will be my new groundhog gun.

There was one error. The bullet is a BTSP (boat-tailed Spire Point).

What kind of rifle is it?

Boat-tails being shot out of an elephant gun. Who woulda' thunk it? Maybe long-range hunting of dangerous game makes sense? "I got my buf at 600 yds."

quote:

Originally posted by Winchester 69:
Boat-tails being shot out of an elephant gun. Who woulda' thunk it? Maybe long-range hunting of dangerous game makes sense? "I got my buf at 600 yds."

you'd shoot a buff at 600 yards? I don't see anyone else mentioning it .. just a (verfy) little humor ... i guess a guy shuoldn't try for an accurate rifle

quote:

Originally posted by surestrike:

What kind of rifle is it?

It's what some call a "hand rifle." It's a Thompson/Center Encore handgun with a 13 inch barrel (including the brake).

That is an extremely mild load, I bet you are under 2300 fps. I run 73gr RL-15 with 270 TSXs@ 2670 fps. No pressure sigs, This is not my load, it's from one of our forum members who is also a PH in Africa. But check out this killer load;


375 target


jorge

It may be mild though that was never my intention. I originally worked it up for my Blaser and stopped pushing the load when the groups started opening up.

Of course a load that is mild with a certain set of components may not be mild in another gun or with different components.

Seriously? That gives a whole new meaning to "hand cannon". Wow! Bet that thing is a handful for sure. Nice group, especially from a handgun. And if that mild load works that well, I'd not do anything else. Better accurate than fast.

David

and my criteria wasn't velocity but accuracy so that's how I arrived at 65 grains.

That is the most profound statement I have seen on this site.

My hat is off to you Sir.

I maybe totally wrong, but in my opinion, slinging any bullet of any size down range at anything accuracy is a hell of a lot more important than speed.

A bullet that groups at a lower velocity will perform a lot better on game than one that won't group because it is being pushed too fast.

JMO.

Grumulkin,

Years a go I had a TC built chambered in 218 bee.

It is the most accurate gun I have ever seen. The builder could get 3 shots in the same hole at 25 yds.

Always pissed me off that I couldn't do that,lol.

Yes, we did load for accuracy,who the heck cares about velocity with a group like that.

Nice TC!

fast

Interesting to see these high speeds with fairly small charges of Rel. 15. My old 22" Stainless Classic liked 73.5 of Rel. 15 with the 270 TSX. That load went very close to 2800 but I didn't think anyone would believe me.