I recently acquired a rather nice Theoben AMT Lightening Target Model (Ruger 10/22 clone in Stainless) and was getting good accuracy with my usual Eley subs, although getting more than my fair share of jams with the standard 10/22 mags - mostly down to light strikes. I changed the hammer spring for a high power one and tried the Eleys with my 25rnd Banana mag but still too many jams. Then I switched to an old box of RWS subs with the 25rnd Banana mag and bingo!! The jamming stopped and she fired the whole box without an issue, but the groups opened right up from 1/2" to around an inch at 50yds!
The rifle was supposedly made to run on Lapua Pistol Match, which are proving hard to find so I was wondering what subsonic ammo you fine gents were using in your semi's in order to achieve good reliabilty and accuracy? I dont mind using solids as if I use her for bunnies it will be head-shots only, so I dont suppose it will matter. Any suggestions welcome.