Home Forums Hunting & Shooting Gunsmithing Winchester Magazine question for 06 based rounds

I have a 338-06 IMP built on a Model 70 classic.

The spacer, such as it is, takes up very little room. You would gain a very little bit, maybe .2" of additional length. I am not sure what you could hope to gain in velocity.

The improved version of the 338-06 allows maybe an additional 25 FPS over the standard version - no more at comparable pressures. If it feeds (mine does), there is no downside I can see to going with the AI (it does look cool) but if it is magnum velocities you want, than build a magnum and have done with it.