Adding a 6.5-284 barrel to a switch barrel/switch bolt head Specialty Pistol.
Also, moving to a magnesium chassis stock, so now, it will be a switch stock as well. Already have one in wood.
Once this arrives, I will have barrels in 25 PRC, 6.5 PRC, 25-284, and soon to be added 6.5-284.
I will...
The times I have gone above max in a load manual, is when the cartridge in question was long for the action chosen...For instance the 284 Winchester.
It was set-up in short action rifles, with the bullets seated quite deep.
Put that same cartridge in a single-shot action, with a longer throat...
There are no cons, other than you will have reduced MV compared to longer barrels
Just use the same powders you would normally use for a standard rifle length barrel of 24-26 inches.
Let's say the MV with 140's is 3000 fps with a 26" barrel.
I would guess 25 to maybe 30 fps loss per inch...