The JR Carbine Thread
- Thread starter Konrad
- Start date
I have run 115gr, 124gr & 147gr without issue.
I have 2 KCI mags and haven't had any issues.
- Location
- Lethbridge
I found that they didn't drop free as readily as the factory ones, sanded them down a little bit and they work fine. No feeding issues at all.
I have a JR in .40 and love it.I loaded up some 180gr XTP's and they shoot about 1 1/2" 5 shot group with a ave. of 1107 fps at 50yrds.I put a vortex strike fire on it,E&L mfg. shrouolt and triggd,fab defence rear stock,ergogrip and grips on the rail.Polished bolt and trigger by me.Fun to shoot steel with but really shines when walking brush for rabbits.Sorry don't post pics.
I bought a KCI mag in .40 and have yet to try it. Don't think there will be any problems.
To the poster that is using high velocity ammo, JRC doesn't recommend it.
Q: Can I shoot Plus-P (+P) ammunition in my JR Carbine? It should not be a problem for you to use Plus-P ammo in your JR Carbine. We initially prohibited Plus-P ammunition because the JR Carbine is a direct blowback weapon with a non-locking bolt. The added power of Plus-P ammunition caused a significant increase in gas discharge through the ejection port without giving any ballistic advantage over conventionally charged cartridges. We were concerned that the higher power ammunition could cause the bolt to move rearward too soon in the firing sequence, before the chamber pressure had dropped sufficiently, thereby prematurely exposing the case wall and causing potentially dangerous case failures. We have subsequently modified our bolt design and significantly increased the weight of our proprietary buttstock buffer. As a result the bolt stays in battery for a longer period, directing more of the combustion gases into the barrel and out of the muzzle. Plus-P ammunition may or may not provide a significant increase in performance at this point, but it should not cause any problems.
Nah they reversed that, it`s fine to use +p on the new models now. I use +p all the time on mine.
I'd like to know as well. I may have an older model, I bought it BNIB from a CGN'r. Not sure how long he had it sitting around... any serial # guys?
unstableryan
CGN Ultra frequent flyer
- Location
- Beautiful Okanagan Valley
I have had 180gr xtp up to 1300 using too much tightgroup. I made a buffer at work that is 19% heavier than the normal one. it makes it better. I wouldn't reuse the brass pushing the limits.
unstableryan
CGN Ultra frequent flyer
- Location
- Beautiful Okanagan Valley
I have a pound of longshot that I want to explore. From what I calculated, it should be a good powder to push .40.
I like glock 26 mags, nice & compact and you still get 10 rounds, plus they line up perfectly with the triggerguard.
Hey thats nice, ill have to get some 26 mags!
