Cba... Interested in hearing more about your 358 BR rifle. Did you shoot group, score and what yardages?
I have an extra 35 rem barrel I thought about rechambering to 358 with a tight neck / freebore.
JCM-
Howdy ! I apologize for my delayed response.
When CBA shoots had just started, I had in-mind to shoot .358" calibre in CBA sanctioned matches. My idea was that I might be able to elevate the number of 10's when shooting
" Score ", by using the larger calibre. And of course, the gun would need a great barrel.
I had Red Scherer ( who was a well known barrel maker in the -70's ) make the barrel.
His Pratt & Whitney rifling machine was set up in a back room of Scheutz Brothers gun store in North Manchester, IN.
I spec'd the rifle barrel to be 1.375" diam where the barrel's shoulder met the recoil lug.
I went with a 5 groove 1-16 SS blank, in a #7 benchrest taper. I thought at the time I would shoot .35Remington. My rifle had a Wichita WBR1375 single shot benchrest-grade action, a 3-lug flat faced bolt; an AR-style extractor; and featured an M-700 trigger that was set to 2 oz.
When I realized there were no CBA shoots in my area, I stored the barrel for 20yr. More on that in a bit....
I experimented with other .357 -.358" cal guns, to see whether any could be made to shoot well enough to be useful for incidental score matches. I traded off an M-336 .35Rem that grouped just average. I next tried a. .357Mag M1894SC, but it was too small and also lacked the necessary accuracy. I then tried a H & R SB-2 " Ultra Rifle " in .357 Maximum,
and it turned out to be THE worst shooting/grouping rifle I ever tried out !! Who was I kidding, thinking I might find an outstanding shooting rifle, from the lower price range of
" Factory " offerings ?
When my .224" cal custom varmint rifle's barrel finally shot out, I decided to at last have the .35" cal Scherer barrel out on. It was a great opportunity to pick a chambering, ane had already been " wildcatting " for 20yr. I had in-mind to try a .358" cal wildcat, instead of shooting reduced loads in a .35 Remington-chambered rifle.
In my benchrest shooting, I had already tried a .22BR; which got me thinking about a notional " .35BR ". My research showed the .357AutoMag case had capacity and dimensions very, very close to what a .358" cal wildcat on BR brass would have.
Hornady offered .357AutoMag dies as a non-stocked item, but they did not have to custom-make them. * I could make a neck sizing die for a .358" cal wildcat by simply using the correct NS bushing in Hornady universal-style shoulder bump / bushing Ns die. *
Found out SSK had a .357AutoMag reamer, and my idea was that I could " expand " the case neck ID up a scant .001" ....and have a true .358" full rifle calibre gun. Unlike the .22BR brass I made from .308basic, I was able to use both 6BR and 7BR brass from
Laupau and Norma... and simply expand them up to final .358" calibre.
I sent the action + barrel to SSK, and J.D. Jones chambered it using their reamer.
After barreled action returned and gun was reassembled, Ii started !load work-up.
I found that fire formed cases had what might be described as almost a " second
shoulder " ( see pic ). This I attributed to the SSK reamer, which was likely spec'd to cut a chamber for brass that had been formed by shortening .308 brass and necking to final .357" calibre ( form the original .357" cal guns ). By using factory-made BR brass, the necks were already thin @ around .010" neck wall thickness to start with....before I necked them up to .358" ID.
The rifle was just stupid accurate ! Case capacity influenced my powder choice, and I went with WW296, as .357AutoMag was brought out as a large handgun cartridge to start with; and I wanted to maximize velocity from the 22" barrel. J.D. had opined before the chamering process that my going w/ a. 22" barrel might serve to reduce Mv,. due to bore drag on the bullet. I did not share his view, and wanted the 22" barrel !length for gun cosmetic reasons for one... knowing I could always have it shortened if need be.
My longest groundhog kill with the rifle was 350yd ( longest shot I tried ). I once shot
3ea 3-shot groups @ 200yd. For all 3 groups, their shots went into a 5/8" bullet hole overlapping cloverleaf pattern.
24gr of WW296 shot great under Rem 150PSPs, and Hornady 180s.
I'll try to send more pics, soon. The webpage has been open for a long time as I wrote, and I don't want to loose what I've gotten done....
With regards,
357Mag