I'd be surprised if the Swede dropped much different than about 24 to 26 fps, per inch , from my experience sporterizing model '96's. I was of course using military barrels which does not apply to your commercial barrel maybe?
As a sidebar, I got great accuracy results going down to 20" on three of those sporters (made them into fullstock carbines). Too many powders to list here, they all worked well, but accuracy honors always went to faster powders than the experts recommend. Near max published loads of 3031, 4895, 4064 and 4320 with any good 140 gr flat base. When I shifted to Barnes 130 gr, all I did was reseat the copper bullets over the same powder charges for wonderful accuracy and very similar ballistics, not that I am a long shooter.
No experience shortening '06 barrels.
Thanks flintlocke, great info!
Have a super weekend.
