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Bullets for the 375 #14022586 08/03/19
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North61 Offline OP
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Picked up a fairly well used 375 Big Bore for the canoe. When it shot 200 grain Factory bullets 2037ft/sec) into 5" groups I wondered. An old box of 250 grain discontinued power point factory loads (1770ft/sec) went into about 2.75 inches and with open sights I find that satisfactory. 255 grain Barnes's and Rl 7 (1850ft/sec) can get into just over 3" groups. However 235 Speer Bullets chucked into the lathe for Flat Pointing to 229 grains and given a cannelure and enough RL7 to get to 2025 ft/sec are giving me the best groups yet. The bullet also out penetrates everything else tried. It expands but I don't know how far out. Wish the 220 Hornady's where still being made.

Video Here

https://www.youtube.com/watch?v=oKNY261k8yQ&feature=youtu.be

300 BP

Re: Bullets for the 375 [Re: North61] #14023217 08/03/19
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North! glad to see you're posting videos again and great minds think alike! I just bought a 375 myself and have been experimenting with lead bullets as well using 5744 powder. Had pretty good luck with the 200gr Sierras and the 250gr Barnes using RL-7 powder, but the factory 200 gr Power Points were awful in the accuracy department. Keep us posted!


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Re: Bullets for the 375 [Re: North61] #14023227 08/03/19
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frank500 Offline
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Thank you North 61. Vollmer bullets makes an assortment of 375 and 38/55 bullets. Their 220 grain performs closely to the Hornady 220. Sure wish Hornady would make a run of them.

Re: Bullets for the 375 [Re: North61] #14023794 08/03/19
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North61 Offline OP
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Too hard to get semi-custom bullets up here in Canada. I can get Hawks. Might try some 200 grain Hawks next.

Re: Bullets for the 375 [Re: North61] #14024140 08/04/19
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North61, I used the 375 Winchester for many years, built a 24in barrel mod94, took moose, black/brown bear and many deer. The 200gr factory were not accurate, 220 Hornady's were a little better, the 250 power point was accurate and performed perfectly. I believe the barrel twist was the reason. When Winchester dropped the 250gr I switched to the 356 as couldn't find a suitable replacement. Have heard a rumor the Kodiak will make a 250 flat point if their is any interest, believe that would be perfect. Ken Waters I believe tried the 235gr Speer but found that it was to stout to expand at 375 velocity.

Alpha

Re: Bullets for the 375 [Re: markak338fed] #14024419 08/04/19
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North61 Offline OP
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I think expansion might be the thorn in the modified 235 grain Speer's side. Flat Nosed the b.c. must go down and I'd bet past 75 yards or so the speed will be so low that expansion would be marginal. The Barnes Original is no great shakes at expansion either. The Winchester 250 grain Power Point seemed to be the best bullet by far but I have only 1 left! I wonder why the big loading companies always discontinue the heavier bullet choice and keep the lightest?


Maybe I'll order up some 200 and 250 grain Hawk bullets and give them a go.

Re: Bullets for the 375 [Re: North61] #14025014 08/04/19
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The 375Win in the top eject 94's is a sweet little combination that carries and points well. I like it and regard the cartridge as a 45-70 lite. Jacketed bullets over 200gr are problem but this caliber is really suited to cast bullets.

The fast twist (1 in 12"), deep rifling (in the Winchesters) and straight wall case point to heavy cast bullet use. The cartridge does have a large throat, but long heavy cast bullets work well.

One of the better mould designs was by Ranch Dog who studied the throat then designed a mould to suit. Moulds for that design are now available from NOE, including a HP option.

There are several off the shelf mould options that work well, though the crimp groove better suits use in a 38/55. A Lee FCD is useful tool to have as it enables you to use a different crimp location. Lyman, RCBS, Redding/Saeco have mould designs available. I have used most of those but the mould I use most is one by CBE in Australia - it's designated 376-300 GC. It's a FN 300gr pill that was specially designed for the 375 Win. My loads using Rel-7 develop 1850fps and accuracy is very good. With cast you can tailor the alloy to suit your game. The addition of a HP can provide Nosler Partition type performance. CBE also have a few other styles now, including one with a wider meplat. So, there are plenty of alternatives as long as you cast your own.

Re: Bullets for the 375 [Re: JFE] #14025082 08/04/19
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North61 Offline OP
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Thanks JFE: I went in and ordered the 300 grain CBE mold from Australia. I got the single mold with top punch. Never Cast before so I am going into unknown territory. I think the weight makes use of the fast twist of the Winchester and I hope it works out!

Re: Bullets for the 375 [Re: North61] #14026626 08/04/19
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JFE Offline
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Welcome to the brave new world of bullet casting. If you haven't already done so you should check out the castboolits forum - there is wealth of info on tap there. Their reference section is well worth a visit too.

The LASC site is another good site for reference data and interesting articles.

http://www.castboolits.gunloads.com/

http://www.lasc.us/CastBulletNotes.htm

Re: Bullets for the 375 [Re: North61] #14029731 08/06/19
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I picked up a Winchester 94 XTR in 375 Win and posted here about it after restocking it with a new OEM brown Win-Tuf stock set. I have 60 rounds loaded with the Hornady 220gr., 80 rounds loaded with the Sierra 200gr. and 200 Sierra Pro Hunter 200gr. bullets when I need to load some more. For me, the rifle will be occasionally used for Whitetail here in the upper midwest at Tamarack swamp distances. I used to be heavily into casting projectiles for handgun and muzzleloader, but have been out of that game for some time now. For the distances I'll be shooting, these bullets will serve me quite well. Always enjoy, and learn from, your topics and videos North61, thanks for posting (still have my dad's first year 71 deluxe, it was neat reading about your testing of the old 348 Speer bullets I sent you).


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Bravo

Re: Bullets for the 375 [Re: DeanAnderson] #14029835 08/06/19
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North61 Offline OP
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Thanks again for that. It's always great seeing how the bullets of yester-year worked. The old bullet factories put more emphasis on low speed expansion than the "premium" bullets of today. Both ideas have their place.

Re: Bullets for the 375 [Re: North61] #14042210 08/11/19
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bill73 Offline
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North61,
Thanks for sharing your experiences,would you mind sharing some details on the lathe that you are using to modify the bullets please?I shoot levers a fair amount & some of the calibers that I shoot,FN bullets are not available.

Re: Bullets for the 375 [Re: North61] #14044478 08/12/19
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frank500 Offline
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Bill
North 61 shows his mini lathe on his YouTube channel. Good stuff

Re: Bullets for the 375 [Re: frank500] #14045058 08/12/19
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bill73 Offline
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Thanks,I looked it up,it's home made & looks like it works real well.

Re: Bullets for the 375 [Re: bill73] #14045593 08/12/19
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Fireball2 Offline
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I had excellent luck with the factory 200's in two Savage lever guns, both one-holers, literally. When factory ammo hit $90 a box I sold it all and now load 200 grain Sierras with the same good results. Love it when a plan comes together.


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Re: Bullets for the 375 [Re: North61] #14060806 08/19/19
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North61 Offline OP
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Sorry folks was on a self guided sheep hunt up here. Man what an experience, but out of forum contact. The Lathe I use is a Taig mini-Lathe, sold up here by Lee Valley and used mostly by mini model makers. I just took the 235 Speers down to 225 grains and will retest..the bullet on media. They might open up mpre if more lead is exposed but the javket is thick. I was thinking on the trip that the 375 with the modified 235 Speers would b a dandy grizzly defense gun. The Speers would penetrate well and 6 in the magazine in a very handy and light package. My 300 grn Cast mold came from australia. I guess I need to qcuire all the rest of the stuff for casting now. Found some 200 Sierras and will test these when they arrive as well.

Re: Bullets for the 375 [Re: North61] #14063394 08/20/19
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RiverRider Online Content
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I "solved" my .375 bullet problem by removing the lead tip from 235-grain Speers and cleaning them up with a file. I intended to test it on a hog or two, but never have had the chance so I don't know whether they'll open up at 2250. I still intend to find out.


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Re: Bullets for the 375 [Re: North61] #14065988 08/21/19
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North61 Offline OP
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Got a one hole group at 50 yards with the 230 grain versions (Flattened 235 Speer) which basically have me removing a skiff of copper. With the 225 versions I had a harder time getting to a consistent weight and they went into 2" at 50 yards. Range too busy to do expansion testing but will get that done shortly.

Re: Bullets for the 375 [Re: North61] #14066363 08/21/19
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Great results, there. I wish I could see my sights better...I've had acceptable accuracy with them but nothing like that.
cry

I would love to see how your expansion tests go, please DO post them!


Life Member NRA, Texas State Rifle Association, Second Amendment Foundation, & GOA

“Evil preaches tolerance until it is dominant, then it tries to silence good.”

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Re: Bullets for the 375 [Re: RiverRider] #14067418 08/21/19
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North61 Offline OP
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Will do!
The one hole group is likely a fluke. 3 shot groups are not statistically telling unless repeatable. However, I also got 2" at 75yards with the 230 shortened Speers and Rl 7. So far seems like the best load.

Last edited by North61; 08/21/19.
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