Harve Curry
Member
I been reading alot here and others, thought I'd ask this question on THR to, copied this info from rimfirecentral site:
.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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I'm planning on going to the Albuquerque gun show looking to buy a accurate 22. Questions that are bugging me is :
Why would Marlin 39A(s) shoot so good, MOA or less? What kind of chambers are used on them?
Why would a semi auto like the Thompson Center R55 shoot MOA ? What chamber and rifling do these have?
Rifling type; button, micro goove, hammer forged?
What is the best twist rate for a 22LR?
Military surplus Romanian M69. By all counts they are accurate shooters, and mass produced!
CZ rimfire rifles.
Ruger 10-22's
Winchester model 52 or a 69?
Steel recievers vs. Aluminum?
Pinned or set screw barrels vs threaded?
Why don't pumps shoot as well as semi auto's, like a model '06 Winchester or can a copy (Rossi 62 or Tauras) be made to shoot as well as a set up 10-22?
It seems to me that even if you don't have a match grade chamber, match grade rifling and floated barrel there are lots of 22's of every description defying everything and getting match grade accuracy.
.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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I'm planning on going to the Albuquerque gun show looking to buy a accurate 22. Questions that are bugging me is :
Why would Marlin 39A(s) shoot so good, MOA or less? What kind of chambers are used on them?
Why would a semi auto like the Thompson Center R55 shoot MOA ? What chamber and rifling do these have?
Rifling type; button, micro goove, hammer forged?
What is the best twist rate for a 22LR?
Military surplus Romanian M69. By all counts they are accurate shooters, and mass produced!
CZ rimfire rifles.
Ruger 10-22's
Winchester model 52 or a 69?
Steel recievers vs. Aluminum?
Pinned or set screw barrels vs threaded?
Why don't pumps shoot as well as semi auto's, like a model '06 Winchester or can a copy (Rossi 62 or Tauras) be made to shoot as well as a set up 10-22?
It seems to me that even if you don't have a match grade chamber, match grade rifling and floated barrel there are lots of 22's of every description defying everything and getting match grade accuracy.