Thread: 22 Upgrade

Have had/polished about 20 JW15s for myself and others. Worst of them shot slightly over 1" groups at 50m, best is mate's one at 0.3s. Almost all shot sub half inch at best and averaged close to that - after barrel chop to 16" and recrown. Sold one recent JW project on this forum about 6 weeks ago - that was typical with a best of 0.43" at 50m, and average (3 groups) of 0.54". Accurate wee shooters and yes a match for CZ on range.

GC ones were often very poor - looked like they were made from a junk parts bin with sometimes poor barrel connection, poor rifling etc. Also Polytech branded JWs poor. I prefer older ones - both wood and synthetic shoot fine.

With this JW, I think Micky's checklist spot on - as is Makros' comment. Run through his checklist. It does sound however like clipping - bullet hitting suppressor on exit. Would account for big spray. If still poor without suppressor, then take action out of stock and check for barrel connection looseness. Then shine light down barrel to see if it has crisp consistent rifling. If you have a doubt, take the projectile out of a 22 cartridge, press it into bore, and push it down barrel with cleaning rod, feeling for consistent pressure and loose spots. This called slugging the bore and any looseness indicates uneven rifling. GC Norincos had this problem occasionally.