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Wow! I knew this was an accurate load but wasn't sure what the ballistics were until today. Ran my last 5 of them over the chronograph, so it's not really enough for statistics, but all indications are that this is a good load:
270 grain Hornady Round Nose Soft Point (sadly, discontinued) 69 grains of RL-15 (I don't have any more, hope it's still available somewhere) Federal 215 magnum primers R-P brass
Average is a mediocre 2533 fps ES is 21 fps SD was a mere 8 fps
Mind you, I'm aware it was only five shots, but I only had five of them left. My 270 gr round nose Hornady bullets are gone. I used that load to do well at the last Safari Rifle Championships, Libby Montana, 2019. Didn't win, but did well with my single shot Ruger.
69 grains of RL-15 is listed as the accuracy load by Nosler for their 260 grain Accubond, and I've taken a few black bear with that load, out to 306 yards, so I know it works afield.
Wish I could latch onto some RL-15 again!
Regards, Guy
Last edited by Cascade; 05/16/22.
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Joined: Sep 2010
Posts: 3,985
Campfire Tracker
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Joined: Sep 2010
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I've always found RL15 to be the bee's knees in the 375. Haven't gotten around to trying RL16. Someday maybe Alliant will catch up with demand.
I am continually astounded at how quickly people make up their minds on little evidence or none at all. Jack O'Connor
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Joined: Jan 2001
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Campfire Outfitter
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If you can’t find the 15 …..maybe you can locate some WW760! My Model 70 shot incredible groups with it. A few grains over listed max, though it was the listed max in a very old Hornady publication! memtb
Last edited by memtb; 05/16/22.
You should not use a rifle that will kill an animal when everything goes right; you should use one that will do the job when everything goes wrong." -Bob Hagel
“I’d like to be a good rifleman…..but, I prefer to be a good hunter”! memtb 2024
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Joined: Sep 2010
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In my quest to get the Barnes 250TTSX to shoot in my M70 (which was unsuccessful BTW) I tried IMR4320, H4895, H335 and a few others. IME the 375 is a very easy cartridge to find an accurate load for and any powder in that general burn rate area will work.
I am continually astounded at how quickly people make up their minds on little evidence or none at all. Jack O'Connor
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Joined: Jun 2001
Posts: 2,207
Campfire Regular
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Back when I worked up my 270 grain load, I was after the same MV as my 180 grain load in my .30-06.
That ended up being 75 grains RL-15 and a large rifle primer for ~2750 fps. Using a 215 primer was fine, but the 210 grouped measurably better.
I just got some more RL-15, so keep your eyes peeled and crawler bot working overtime...
It's you and the bullet, and all the rest is secondary.
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Joined: Jan 2001
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Campfire Outfitter
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I've owned three Pre 64 Model 70 375s and all three were exceedingly accurate. Cloverleafs were the norm with the Hornady 270 bullets and a load of H4831 behind it... shooting one from the bench wasn't a pleasant experience, though , which is why they all eventually went down the road...
Never underestimate your ability to overestimate your ability.
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Joined: May 2014
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They still make 270 grain SP, not RN. I have quite a few of them. Where I hunt, I need to keep away from temperature sensitive powders. I have had bad experiences with WW785, WW760, & H414. I think WW785 was the worst. I had tested a very accurate load in my 300 Win Mag with WW785. I took it out to the Ft. Peck range; it was a little over 100 degrees. The last round I shot had the base expanded into the bolt so that I had to take the bolt out and put a lot of side force on the bolt while the case was in a vise to get the case out of the bolt. Before I mounted a scope on my 375, I shot this load (iron sights)
375 H&H AI, Winchester, Pre-64 70, 300 grain Hornady RN, 85 grains IMR4350, 2.54 MOA
I've loaded up some 270 grain loads and will be testing them.
Last edited by Bugger; 05/17/22.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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Joined: Jan 2001
Posts: 7,969
Campfire Outfitter
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They still make 270 grain SP, not RN. I have quite a few of them. Where I hunt, I need to keep away from temperature sensitive powders. I have had bad experiences with WW785, WW760, & H414. I think WW785 was the worst. I had tested a very accurate load in my 300 Win Mag with WW785. I took it out to the Ft. Peck range; it was a little over 100 degrees. The last round I shot had the base expanded into the bolt so that I had to take the bolt out and put a lot of side force on the bolt while the case was in a vise to get the case out of the bolt. Before I mounted a scope on my 375, I shot this load (iron sights)
375 H&H AI, Winchester, Pre-64 70, 300 grain Hornady RN, 85 grains IMR4350, 2.54 MOA
I've loaded up some 270 grain loads and will be testing them. Do you need some 375 H&H AI brass? I have about 50 pcs for a rifle I bought but never shot. The brass was fireformed and not shot again AFAIK...
Never underestimate your ability to overestimate your ability.
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Joined: Apr 2005
Posts: 30,811
Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2005
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I loaded 80.5 grains of CFE223 in Winchester cases behind the 270 gr Hornady SP for 2706 FPS
I got banned on another web site for a debate that happened on this site. That's a first
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Joined: Nov 2018
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I loaded 80.5 grains of CFE223 in Winchester cases behind the 270 gr Hornady SP for 2706 FPS Useful load. I like the idea of moving a 260 - 270 grain bullet about the same speed that my 30-06 moves a 180... I've thought about trying CFE 223 with the 375 H&H... Guy
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