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A typical,sporting 22 has a ‘field chamber’, it is a bit on the loose and long side, and in a semi-auto they may be a bit looser than in a bolt action. Manufacturers dont want failure to feed or extract issues....
Match chambers, which vary, are min. dimensions and short enough that the bullets often engage the rifling. Some ammo is fatter and the driving band farther forward so fully seating issues can arise, especially in semi-autos.
Since we are concerned with the 10/22 here we will say that the better than field chambers for a semi-auto arent ‘quite as tight/short’ as for a bolt action but an improvement over the oem chambers. Reports are that the oem barrels shoot quite well after this work is done. Then ammo becomes the search.
How so? The accuracy is greatly affected by the all important chamber throat and reliable/consistent ignition by min. headspace, all good things. The re-work of the barrel via setback and a touch with the right reamer and the bolt squared/trued and headspaced bets your ‘launch platform’ in order.
Aftermarket barrels already have the better chambers, you still may want or need bolt work or a replacement bolt. No sense in having a poor trigger if you get those others upgraded.
Match chambers, which vary, are min. dimensions and short enough that the bullets often engage the rifling. Some ammo is fatter and the driving band farther forward so fully seating issues can arise, especially in semi-autos.
Since we are concerned with the 10/22 here we will say that the better than field chambers for a semi-auto arent ‘quite as tight/short’ as for a bolt action but an improvement over the oem chambers. Reports are that the oem barrels shoot quite well after this work is done. Then ammo becomes the search.
How so? The accuracy is greatly affected by the all important chamber throat and reliable/consistent ignition by min. headspace, all good things. The re-work of the barrel via setback and a touch with the right reamer and the bolt squared/trued and headspaced bets your ‘launch platform’ in order.
Aftermarket barrels already have the better chambers, you still may want or need bolt work or a replacement bolt. No sense in having a poor trigger if you get those others upgraded.