Large or small bores will affect the velocity a bit, but they don't usually affect it that much. I personnally use a large overbored barrel for everything. That way I don't have to worry about breaking fragile paint as the bolt pushes it into the back of the barrel.
If your regulator piston has never been updated, you should get a new one. AGD or Tunaman can sell you a new one. I think the higher pressure version is now the standard piston assembly in all mags.
If your regulator piston has never been updated, you should get a new one. AGD or Tunaman can sell you a new one. I think the higher pressure version is now the standard piston assembly in all mags.
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