375 H&H Loads

RL15 and H4350 both produce velocities that raise my eyebrows in the .375 H&H.

By Barnes data, not a GMX but the closest thing being a mono, even 270gr solids can be pushed to 35fps shy of 3,000fps and stay within pressure limits.

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I know this to be true, my 270 TSX load in my H&H clocks 2925 out of a 24" tube with RL 15 AND I have used this load in 50 deg C heat with no problems what-so-ever. Not even ejector marks..............it is one killing machine even out beyond 300 mtrs. I found IMR 4350 to give excellent ballistics and accuracy as well, but is too bulky to use with 270s in the H&H case, which is why I tried RL15, to get away from heavily compressed loads. Shoots well under an inch if I'm having a good day and kills everything I point it at.
 
I don't have a Barnes manual but the highest velocity that Hornady lists for the 375 Ruger with the 250 grain GMX is 2700fps and I suspect it would produce considerably less pressure than the TSX due to the cannelures. Be interesting to see what they come out with for the H&H but I doubt it will be anywhere near 3,000fps.
 
I'm hunting waterbuck, black wildebeest, impala, nyala, eland and possibly sable
Vanessa has springbuck, blesbuck, Burchell's zebra, red Lechwe and lioness on her list

We wouldn't turn down any of the small cats or a brown hyena either and are open to a Steenbuck and duiker if opportunity presents.
 
I don't have a Barnes manual but the highest velocity that Hornady lists for the 375 Ruger with the 250 grain GMX is 2700fps and I suspect it would produce considerably less pressure than the TSX due to the cannelures. Be interesting to see what they come out with for the H&H but I doubt it will be anywhere near 3,000fps.

I'm actually going to bet it should be just about 3,000fps actually, going by the 235gr TSX which exceeds 3,000fps on published Barnes data, and the 270gr banded solid at 2965fps published. The old H&H can really scream with mono's inside pressure limits.

Sounds like a very solid plains game experience, have fun and a full bag to ye. My Zebra rug is one of my favourite trophies, sounds like you may already have one too anyhow, if not, it'll be a center piece. One of the few trophies my wife likes!
 
I'm actually going to bet it should be just about 3,000fps actually, going by the 235gr TSX which exceeds 3,000fps on published Barnes data, and the 270gr banded solid at 2965fps published. The old H&H can really scream with mono's inside pressure limits.

Sounds like a very solid plains game experience, have fun and a full bag to ye. My Zebra rug is one of my favourite trophies, sounds like you may already have one too anyhow, if not, it'll be a center piece. One of the few trophies my wife likes!

Interesting...sounds like Hornady is pretty conservative with their loads for this bullet. I guess that may change once they play with some more loads.

Ya, we are filling in some plains game holes left from our trip to Namibia. We did a free-range indigenous hunt there so the available species were limited. We both took Hartman's Zebra in Namibia. One is a rug and the other a pedestal shoulder mount. I think we might add the Burchell's to the same pedestal as the Hartman's. It should look pretty cool. Can't wait to eat zebra again too....my favourite meat from our Namibian trip.
 
I read somewhere that the GMX bullets were designed to have the same pressure curve of other Hornady bullets, hence the sometimes odd cannelure and ogive.

Yep, that's supposed to be one of the big selling points, you don't need to dig up a new set of loading data for a solid copper alloy bullet. Unlike Barnes or others.
 
Yep, that's supposed to be one of the big selling points, you don't need to dig up a new set of loading data for a solid copper alloy bullet. Unlike Barnes or others.

Ya, the SST load data is pretty well interchangeable with the GMX and in most rifles, zero doesn't change. The GMX is actually guilding metal....not solid copper like the Barnes offerings.
 
A lot of velocities do not coincide with what the manual states, a lot of this is due to the elevation the round is fired at. The closer to sea level the round is fired at the lesser the velocity, within reasonable range. If I work up a load at a higher elevation and wind up shooting it at sea level, I would be very careful about my pressures and more so with temperature changes.
I do a lot of reloading and at the elevation here I find my loads exceed the manual by 40 to 60 fps, not too much but I would expect to see higher results when moving to a different elevation.
 
Not sure what all this talk is about shooting anything other than a 300 grain bullet in a .375 -- forsooth, gents! :p

Myself, I've found that 67.5 grains of IMR 4064 under a 300 grain Swift A-Frame or Hornady solid will produce nice groups and just a hair under 2600 fps in my Ruger RSM. Anyone who thinks that's not a flat shooting recipe should PM A-Zone and ask about his 265 yard head-shot on a klipspringer with that load. I wouldn't believe it either if I didn't own a copy of the video ;)
 
Got to love those 300 grain A-Frames. (In all fairness though, the head-shot on the klippy was lased at 244 yards:). As I recall, the baboon was a hair farther, at a lased 250 yards.)

There's a lot to be said about the accuracy of those long, heavy bullets.




Are we there yet?;)

Not sure what all this talk is about shooting anything other than a 300 grain bullet in a .375 -- forsooth, gents! :p

Myself, I've found that 67.5 grains of IMR 4064 under a 300 grain Swift A-Frame or Hornady solid will produce nice groups and just a hair under 2600 fps in my Ruger RSM. Anyone who thinks that's not a flat shooting recipe should PM A-Zone and ask about his 265 yard head-shot on a klipspringer with that load. I wouldn't believe it either if I didn't own a copy of the video ;)
 
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Not sure I'd go so far as to call it flat shooting but when zeroed at 100 yards I'm 13 inches low at 300. Not too bad for a big chunk of lead.....errrrr I mean guilding metal.
 
Everyone knows you're not supposed to shoot your trophies in the head A-zone, a little hard on capes wouldn't you say? I shot my Puku at 280 mtrs with my 375 H&H loaded with 270 gn TSXs and sighted right on at 200 mtrs. The PH and trackers couldn't believe I hit him looking straight at me at that range.
 
Not sure what all this talk is about shooting anything other than a 300 grain bullet in a .375 -- forsooth, gents! :p

Myself, I've found that 67.5 grains of IMR 4064 under a 300 grain Swift A-Frame or Hornady solid will produce nice groups and just a hair under 2600 fps in my Ruger RSM. Anyone who thinks that's not a flat shooting recipe should PM A-Zone and ask about his 265 yard head-shot on a klipspringer with that load. I wouldn't believe it either if I didn't own a copy of the video ;)

I've shot 9
Buffalo with the 270 grain A Frame, none of them asked for a refund:p Did I tell you I have the 450 grain .458 AFrames strolling along at 2350 fps now? It hard to ignore an extra 1000 foot pounds of energy, but Im sure the buffalo will still try.
 
I've shot 9
Buffalo with the 270 grain A Frame, none of them asked for a refund:p Did I tell you I have the 450 grain .458 AFrames strolling along at 2350 fps now? It hard to ignore an extra 1000 foot pounds of energy, but Im sure the buffalo will still try.

I doubt the buff will notice the increase in energy but the bigger hole and surrounding tissue damage will undoubtedly get his attention.
 
Hornady has published some load data for the 375 Ruger that seems quite conservative but nothing for the H&H yet. Ya, I'm thrilled with the velocity and accuracy of this load and considering we leave for Africa in two weeks I don't think I'll be messing with anything...lol I suspect they'll have something out for the H&H shortly. Zeroed at 100 yards, I'm only 3.6 inches low at 200 yards and 13.1 inches low at 300. That works for me!

WOW, have a great trip TJ. Look fwd to hearing the stories.
Puma
 
I doubt the buff will notice the increase in energy but the bigger hole and surrounding tissue damage will undoubtedly get his attention.


Tell you what, after 9 with the .375 and 10 with .458 I know that something is making a difference. I'm unlikely to go bigger, so faster is the move I'm checking out next. My new .458 load has about 1000 fp more energy than my old one.
 
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