Selmer - My Tactical 20 barrel is on an Encore rifle with a 24" barrel made
by VVCG. I originally wanted a 26" barrel, but Steve Stratton talked me
into a shorter barrel, as it would come to weigh 10 1/4 pounds with scope
as it is. The extra two inches may very well have offset the balance.
Although the inventor of the cartridge says he got 4350fps with his, I get
way too much pressure at anything beyond 4100fps with the Winchester
brass. I'm about to prepare the IMI brass that Todd Kindler used since
it is supposed to withstand higher pressures, but will probably make loads
at 4000-4100fps (possibly even slower) to help the barrel last longer. The
only bullets which had flyers were the 36gr Bergers at the higher speeds.
Loaded slower, I've gotten 1/4" groups with them. Any bullet tried so far
is accurate with just a little load testing.
In a 16 1/4" barrel you may have a little more of a kick, but it is pretty
easy to keep the scope on target with this rifle barrel.
http://www.angelfire.com/sd/6mmackley/danno.html