If there's a possibility of shooting 350 grainers from an H&H or Wby, should I go with a 10 twist over the standard 12? Will a 10 twist hurt anything if shooting 270 gr. bullets? Will it help? In the reloading section of this site there are several loads for the 375 Wby and 350 gr. bullets but it did not mention the twist rate of the rifle.

I field tested the 350 gr. Woodleighs for Woodleigh...They shot well in all the 375s I used them in in both 10 and 12 twist, I couldn't see any difference...They also performed perfectly on a number of Cape Buffalo and also some shooting of dead Buffalo to test buller performance...The PP was tougher than the RN, but both worked in a std. 375 H&H..I am not sure how they would perform at the additional velocity of the Wby..

For the std. H&H I doubt there is a better bullet, some are just as good, but perfect expansion is perfect expansion, can't get any better than that...I only shoot Northfork and Woodleighs in my 375....

I also had the same resulets with the 450 gr. Woodleighs in my 416 Rem. both PP and RN..I only shoot woodlieh, Nosler and Northfork in my 416s...

That is good to hear. I know the 12 twist has worked for the better part of 100 years, but the 10 twist just might be better or at least a safer bet if 350 gr. bullets are on the menu. Moreso even if you're not losing anything when shooting 270-300 grainers too.

Is the 12" twist standard on the 375 Wby? What twist is Saeed's 375/404?

The 350's being a round nose, probably aren't nearly as long as a 300 Barnes bullet. I'd bet the 1 in 12 works OK, but have no personal experience.

Woodleigh would not sell the 350s if they did not fully stabilize in the H&H at the std 1 in 12 twist rate.

quote:

Originally posted by Prewar70:
If there's a possibility of shooting 350 grainers from an H&H or Wby, should I go with a 10 twist over the standard 12? Will a 10 twist hurt anything if shooting 270 gr. bullets? Will it help? In the reloading section of this site there are several loads for the 375 Wby and 350 gr. bullets but it did not mention the twist rate of the rifle.

I said in that piece that it was a Winchester M70 Classic Stainless in .375 H&H rechambered to .375 Wby.

That would mean it had a 1 in 12" twist barrel.

A 12" twist is indeed fast enough for the lead core 350 grainers and the monometal copper 300 grainers.

A 10" twist would be great too, even for the lighter bullets, as long as your targets are closer than 1760 yards.

The 12" twist standard is one reason the .375 H&H has always been so good. I am a fast twist proponent, but I would just as soon stick with 12" on all my .375's.

I do have 10" twist barrels on a .475 Capstick, a couple of 500A2/.510JAB's, and a .404 Jeffery, which all work great with all the bullets I have tried.

I have a 12" twist on a 45 Lapua and a .416 Dakota.

10" or 12", take your pick. No big deal. 12" twist .375 barrels are available from any maker of .375 barrels.

Rhino Bullets makes a 380 grain soft nose for the .375 HH in case anyone wants to step up from 350's.

RIP,

As you said in another post, all of your 375s are 12" twists but yet you are a fan of fast twists. Why have you not opted for a 10 twist on some of your custom 375s? If they are factory I understand. Maybe because the 12" just simply works and there's no sense in complicating things? I am not trying to over-analyze twist rate here when it really doesn't matter in this situation but for curiousity's sake, do you see any need to go to a 10" twist on a 375? Any gains to be had?

quote:

Originally posted by Prewar70:
RIP,

As you said in another post, all of your 375s are 12" twists but yet you are a fan of fast twists. Why have you not opted for a 10 twist on some of your custom 375s? If they are factory I understand. Maybe because the 12" just simply works and there's no sense in complicating things? I am not trying to over-analyze twist rate here when it really doesn't matter in this situation but for curiousity's sake, do you see any need to go to a 10" twist on a 375? Any gains to be had?

Factory .375 barrels have been very good to me. After all, i am a hillbilly.

Most of my .375 rifles have used factory barrels on straight factory rifles, or proven accurate take-offs re-installed on other actions (Whitworth, CZ, Winchester), or simple rechambers of factory rifles, except for:

Douglas .375 H&H 12" twist
Dan Lilja .375 Lapua 12" twist

The 10" twist would definitely be considered if I went for a rifle slower than the .375 H&H, such as the .375-06/Scovill, etc., but it ain't gonna happen.

With the rifles faster than the .375 H&H, the higher velocity is going to give greater rotational speeds in the standard 12" twist, so I haven't seen the need for faster twists than 12" in .375 Wby and up.

Besides hardly anyone makes a faster twist than 12" in .375 barrels, do they? I already have half a dozen McGowen Barrels of fast twist variety and need to branch out to a bit more variety.

Pac-Nor, per their website, currently offers a 5 groove 8" and 12" twist. And a 6 groove 10" and 14" twist.

RIP what twist does cz use for there .375 H&H ??

Also when I had my 50-110 built I had a 1 in 22" twist barrel fitted as that is what David Clay reccomended for a modern built 50-110 originally they where 1-26" etc whats the deal with taht and what does it mean ??

quote:

Originally posted by Prewar70:
Pac-Nor, per their website, currently offers a 5 groove 8" and 12" twist. And a 6 groove 10" and 14" twist.

Hey, that is good to know, I just never looked it up.

quote:

Originally posted by PC:
RIP what twist does cz use for there .375 H&H ??

Also when I had my 50-110 built I had a 1 in 22" twist barrel fitted as that is what David Clay reccomended for a modern built 50-110 originally they where 1-26" etc whats the deal with taht and what does it mean ??

PC, 12" twist by CZ for .375 H&H.

Slower twist in those old blackpowder cartridges, eh? They are mainly used with stubby flatnosed bullets that take well enough to the slow twists, eh?

I guess you won't be shooting 750 to 800 grain target bullets with your 50/110.

Prewar70, i have used Barnes Originals in 350 grian for many years in my Pre 64 Mod 70 with 1 to 12 twist with good results. Before it was re-barreled it was 1 to 10 and shot just as well . Velocity has alot to do with shooting heavy for caliber bullets. Experiment till you find the right combo of powder type and charge. Hope this helps you out. Charlie

Thanks Charlie. Did you see any better performance with the 10 twist? Anything you liked better with a 10 twist?

JStevens,
Reference your post, the 350 gr. Woodliegh comes in both the RN and the excellent PP...the PP being a little tougher bullet than the RN btw...but both are fine at 375 H&H velocity, have not used eigher in the faster .375s, but they were designed for the .375 H&H velocities.

quote:

Originally posted by Prewar70:
Thanks Charlie. Did you see any better performance with the 10 twist? Anything you liked better with a 10 twist?

The original 1 in 10 twist liked the 300's better,but shot the 350's just as well if i backed off the charge by 2 grains of 4064. That was only one rifle and as you know their just like women. Hope this helps you out. Charlie

While developing loads for the 350 gr PP and Solids, I noticed something worth mentioning. Because of the length and blunt nose, the solids come dangerously close to the lands (in my rifle) when seating to the groove in the bullet. I trimmed .020" off the unfired cases I used for the Solids before loading.

quote:

Originally posted by Charles Mc Williams:

quote:

Originally posted by Prewar70:
Thanks Charlie. Did you see any better performance with the 10 twist? Anything you liked better with a 10 twist?

The original 1 in 10 twist liked the 300's better,but shot the 350's just as well if i backed off the charge by 2 grains of 4064. That was only one rifle and as you know their just like women. Hope this helps you out. Charlie

Sorry to keep bugging you Charlie but seeing as you've had experience with both, if you were building a 375 today and shooting mostly 270 and 300 grain bullets, but maybe the occassional 350, would you pick the 12 or 10 twist?

quote:

Originally posted by Prewar70:
Pac-Nor, per their website, currently offers a 5 groove 8" and 12" twist. And a 6 groove 10" and 14" twist.

The .375 H&H is one of those early calibers that was blessed for its time with a fast twist when it was born and Winchester added it to its list of "faster" twists as well. Winchester and others didn't bring the antiquated 3/8" bore twists into the picture as their competition did in .35 or you would see a .38-55 twist!

Even by today's standards the .375 twist (1 in 12") is "quick" for the dynamics of the bullets it shoots. Now I would probably prefer 1 in 10" for the 350gr Woodleigh but I know 1 in 12" should handle the RN shape fine.

I wish you hadn't posted the PacNor 5 groove - -1 in 8" .375 barrel availability though......... I may just have to have another .375 now...

BigRx

quote:

Originally posted by Prewar70:

quote:

Originally posted by Charles Mc Williams:

quote:

Originally posted by Prewar70:
Thanks Charlie. Did you see any better performance with the 10 twist? Anything you liked better with a 10 twist?

The original 1 in 10 twist liked the 300's better,but shot the 350's just as well if i backed off the charge by 2 grains of 4064. That was only one rifle and as you know their just like women. Hope this helps you out. Charlie

Sorry to keep bugging you Charlie but seeing as you've had experience with both, if you were building a 375 today and shooting mostly 270 and 300 grain bullets, but maybe the occassional 350, would you pick the 12 or 10 twist?

I would go with the 1 in 12 i think the 1 in 10 is a bit fast for that cal. and it may be the reason why the first barrel's accuracy failed after ten years of use. You can't go wrong with a slower twist with todays longer bullets, and powders that develop more velocity. The 350's were my favorite round for large game and they did what they were supose to do, penetrate and mushroom nicley. Hope this helps you out. Charlie

I really can't see a reason to use a 350 gr bullet . Most of your large game animals can be taken with 270-300 gr. bullets. One must alway's remember the larger the bullet the more recoil . I tried the 350's and found that they work well in both the 1&12 and the !&10 twist . but didn't feel that the added recoil was worth the extra 50 gr.

quote:

Originally posted by GlacierBear:
I really can't see a reason to use a 350 gr bullet . Most of your large game animals can be taken with 270-300 gr. bullets. One must alway's remember the larger the bullet the more recoil . I tried the 350's and found that they work well in both the 1&12 and the !&10 twist . but didn't feel that the added recoil was worth the extra 50 gr.

One thing i learned along time ago is this; there is only one kind of dead but many kinds of wounded. I have always prescribed to the age old principle of bullet weight plus velocity equals penetration, and that what kills game. The extra 50 grains of weight is welcome any time you are after a animal with heavy muscle and large bones. I don't notice the extra recoil, its all about return for investment. Charlie

quote:

Originally posted by Atkinson:
both are fine at 375 H&H velocity, have not used eigher in the faster .375s, but they were designed for the .375 H&H velocities.

Ray how fast do you drive the 350gr Woodleighs in the H&H. Have only tried one load in my 375 RUM & 85gr AR2209/H4350 Extreme, Fed215 is giving me 2482 fps out of a 24 inch barrel. But accuracy is so good in my rifle I may not try for any more velocity except to get same POI as my 300gr Barnes X loads.

RIP & ors what velocity should I be able to get with the 350gr bullets in the 375 RUM without exceeding say the SAAMI pressure limits?

Thanks,
JohnT

John T,
When in Tanzania year before last, I was shooting them at 2350 FPS, both the RN and PP and they killed extremely well with two big holes on broadside shots even when a shoulder was broken and when both shoulders were shattered they came to rest on the off side skin expanded to a a quarter size or larger..

I got the impression they bumped my old .375 to a 416 remington level..I have only shot about 9 buffalo with them but I have been impressed so far with the results...very much so.

The PP are the tougher of the two styles, but the RN do a bit more damage, so its a trade off..IMO they seem to outclass the 300 gr. bullets in killing effect, or at least from my point of view...

Ray,

I have PP, and RN loaded at 2350.

Which did you prefer on buffalo?

JohnT,
Surely you could get 2700 fps with 350 grainers in the RUM if you wanted to, using RL-22, MRP, or IMR-7828. H4350 would sure get them going but how fast within pressure limits I do not know.

Your 85 grain H4350 accuracy load with 350 grainers approaching 2500 fps in a 24" barrel sounds perfect to me. I'll have to remember that one for 350 grainers in the .375 RUM.

btt

Soda,
I think I liked the RN the best, they did more damange internally and mostly made two very big holes..If I need more penitration then I would fall back on a Northfork cup point or flat nose solid...