islandhunter
CGN Regular
- Location
- princeton b.c.
I am looking to ream a 40s&w JR carbine barrel to 10mm. Can anyone recommend a Smith for this job? Or know of a reamer out there?
Thanks!!
Thanks!!
Reaming 40sw to 10mm
- Thread starter islandhunter
- Start date
islandhunter
CGN Regular
- Location
- princeton b.c.
I'm planning on changing the mag well to the 45acp version and changing to tungsten buffer weights. I'm very open to any input on this
That's all you would really need. FWIW I had one of the TNW Aero 10mms and it handled the cartridge better than any other gun I have used. It was surprising to see 100% reliability with almost zero case expansion from a simple blowback mechanism and such a relatively powerful cartridge.
islandhunter
CGN Regular
- Location
- princeton b.c.
Interesting, my shooting partner has TNW in 9mm that's been very good to him. How was the accuracy in your 10 ?
I never bothered to do much serious accuracy testing. What little I did do ended with something like 3-4" groups at 100m. I only really sold the TNW because it had a surprising amount of recoil and I don't care for guns without iron sights.
islandhunter
CGN Regular
- Location
- princeton b.c.
I think it's only a 17" barrel. I talked to them last year about a Canadian legal 18.6" and they said it's in the works, but who knows.
islandhunter
CGN Regular
- Location
- princeton b.c.
Ok, so it looks like I'll be ordering my own reamer.......What do we think about this; cut the throat with a throating reamer and load 10mm length cartridges in 40 S&W brass? This would still allow you to shoot bulk ammo and load hunting loads as well. Brief internet research has taught me that 40 brass is built for basically the same pressures as 10mm 
Think youd have to custom load as 10mm loads are designed with that extra case length included. Loading 40sw longer wont give you 10mm performance. You would likely still need a new mag and magwell to i would think
islandhunter
CGN Regular
- Location
- princeton b.c.
Thanks Rob, for the suggestions. I have ordered a throating reamer from Manson dreamers as well as a new mag well from JRC. Just waiting for info on spring and buffer weight. I hope this rifle doesn't get banned once I'm done
islandhunter
CGN Regular
- Location
- princeton b.c.
*update* Well, I ended up do ing this myself. It turned out successful, I was able to get 1220 fps with a 200 grain xtp and 40 s&w brass. JRC informed me that MY rifle has the same buffer setup as their 10mm versions. Accuracy is actually better with the new long loads than it was before with factory 40. It still shoots the factory stuff well with about 2" groups at 50 yards. The long loads were one ripped up hole at that distance.
