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View Full Version : 32/40 twist & bore??



brayhaven
07-13-2009, 09:24 PM
I'm getting ready to barrel a browning 1885, that will be used 75% with BP and cast, and 25% smokeless & cast with an occasional jacketed bullet for laughs. I haven't shot all that much with cast bullets. I realize it will have to be a compromise as these things often are for those shooting assignments.
I'm thinking of going with a .323 bore for a better selection of bullets, but am wondering what twist I should have in it. I've had very little experience with the 32/40, but have had some with the 32 WS which had a twist way too slow for the bullet used IMO. I see some of the BPCR guys are using real fast twists for those long bullets.. So what do you think .... 1/10, 1/12??
Any thoughts & experience appreciated here.
Greg

2Tite
07-13-2009, 10:17 PM
Most of the original factory rifles had 1/15 or 1/16. Most schuetzen folks use 1/14 so that they can handle 200 gr bullets. Some use 1/12 and handle bullets up to 230 gr. I guess it depends on the bullet weight and velocity that you want to achieve.

Marvin S
07-14-2009, 08:27 PM
I believe my new Win 1885 has a 1-14 If that means any thing.

Jesse168
07-15-2009, 12:12 AM
Most of the Winchester rifles had a 1-16 twist.

Where do you find a big selection of bullets for the 32/40 ? Most of the bullets made for the 32 caliber (.323) are not made for the 32/40 but instead made for the 32 Special. The crimping groove (cannelure) in most of these bullets is not compatable for the 32/40.

I have posted a request on this site several times for any help finding some 32/40 bullets without any responce. 45nut has even tried to help me find some. I have a 1915 Winchester model 94 that I want to reload for and still haven't found any gas checked bullets for.

Jesse168

brayhaven
07-15-2009, 07:43 AM
Thanks Jessie, That's why I'm thinking of going with a .323 bore instead of the .321. Also, if I decide, down the road, to make a more serious hunting rifle out of it, I can always re-chamber it to one of my all time favorites: 8X57JRS :o). I'm leaning towards a 1/12 twist.

It's strange that most folks when discussing rifling twist rarely mention velocity, which is half the equation. RPM's, it would seem, should be the stabilizing factor.. EG: a bullet from a 1/12 twist @ 2000 fps should have the same stability as one going 1500 from a 1/9 twist barrel.. Or am I missing something here??? Not accounting for fouling, stripping etc etc of course. Just a pure relative stability calculation.:)

Greg

ovendoctor
11-28-2009, 12:25 AM
Most of the Winchester rifles had a 1-16 twist.

Where do you find a big selection of bullets for the 32/40 ? Most of the bullets made for the 32 caliber (.323) are not made for the 32/40 but instead made for the 32 Special. The crimping groove (cannelure) in most of these bullets is not compatable for the 32/40.

I have posted a request on this site several times for any help finding some 32/40 bullets without any responce. 45nut has even tried to help me find some. I have a 1915 Winchester model 94 that I want to reload for and still haven't found any gas checked bullets for.

Jesse168

if you would like some 321/297 cast gascheck ill send you some

I have been off line for 4 months and just starting to get the bench back together:groner:

I have a 1894 in 32/40 that is a tack driver

Pm me if interested

Doc.:redneck: