MVA scopes and barrel lenghts?

[Kurt]

Eric I have a 28" MVA scope on a 35" barrel and it makes it past 1000 with the creedmoor rear mount.
I also have a 20" DZ scope and it will make the 1K also. With the .225 rear base and the .175 front base I have 200 minutes of elevation, more then enough for the 1K for my rifles.
Both scopes have good glass but I have a problem with the MVA scope with the reticle barrel twisting from the torque of the rifle. I had it in the shot twice to correct this problem. I'm not the only one that has this happen with the MVA scope.
I ended up gluing it in using fingernail polish.