Shilen is the Mfg.
Bentz is the chamber spec.
Shilen is among the top Mfg's
As long as the barrel...any barrel is made for the 10/22 is will mount to the Rec., that is where all are alike ends. Kid and RT have their own Prop. chambers and do not openly show them...TacSol is a "tweener" which is between Sporting and Bentz.. nemohunter a RFC famous re-chamber guy has one he calls SupaMatch...Read up in the barrel section.
http://www.rimfirecentral.com/forums/showthread.php?t=16859
http://www.rimfirecentral.com/forums/showthread.php?t=298548
http://coolguyguns.com/webstore/ind...Path=6&zenid=d4484976d5ca3bab8f93f686a9f77ac0
.22LR Chamber Dimensions:
Type______Length__Mouth Dia._Throat Dia._Taper @ Throat
Sporting____0.7751"____0.2307"____0.2270"
Bentz______0.6900"____0.2270"____0.2255"_____1.5° Taper
Match _____0.6876"____0.2267"____0.2248"
Win 52-D___0.5800"____0.2278"____0.2248"_____2.0° Taper
The "Ruger" 10/22 factory chamber is the "Sporting" chamber above.
The "Bentz" chamber is the 'match' chamber for semi-autos.
The "Match" chamber is for bolt actions.
The "Win M52-D" is a bolt action target rifle.
.22 Long Rifle Headspace: .0425" GO // .045" NO-GO