TargetTalk

Hi all, considering one of the above barrelled actions. Anyone got any information/experience with these beautys? Looking at them on the AHG website they look to have the same barrel mounting system, but do they?
Also the twist rates vary from 1 in 50cm/66cm(barrel length) or 69cm(barrel length). What would be the best twist rate for 50m prone match?
Any advice/info would be greatly appreciated!!! THANKS!!!
ADDS033

I have a 2013 with a 500mm barrel.
The only difference between the 2013 and the 2007 is the barrel profile. the 2013 has a straight taper barrel until the final two inches where it becomes larger.
the 2007 taper is the thinner. From the action it quickly tapers down and then is straight till about 2 inches from the muzzle.

All 20 series actions come with a 1-16 twist barrel.
matt