I have had three "improved" 280's, two AI and one RCBS. I have also shot a 280 a lot. My 280 with a longer throat, OAL 3.45, is about 30-35 fps behind the "improved" cases at equal pressures. In a hunting rifle, I would use a 22-23" barrel.
Very interesting approach.
I've heard here that long throating like this, fixes the 7mm Rem mag
How long do you trim your 280 cases? ie. do you let them grow longer than 2.540" with appropriate chamber adjustments for neck length?
Originally Posted by RinB
The reason the improved cases are more difficult to get to feed as slickly as a standard is because of the reduced body taper. The shoulder angle has nothing to do with that other than most "improveds" have both.
another good reason to just extend the throat if you have the mag length.
Originally Posted by RinB
Also the idea that a 280 AI is lighter than a 7 mag is just wrong thinking. Same stock, same barrel, same action...the magnum will be slightly lighter because the chamber removes a little more steel.
Kimber 84L changes that
Originally Posted by RinB
I would get the standard built but have the throat extended. Cases and dies are cheaper. Or just get a 270 or a 7RM.
Very interesting thoughts, please elaborate on throat lengthening.
