wildcat junkie:

can you run this info on your program for me and give me the results.

280 ackley improved
140 gr. accubond
60.5 grains reloader 22
3.450 c.o.l.
24" factory barrel
remington action

7mm ultra mag
140 grain accubond
87 grains reloader 22
3.610 c.o.l.
26" factory barrel
remington action

7mm ultra mag
140 grain accubond
86 grains h4831 sc
3.610 c.o.l.
26" factory barrel
remington action

280 w/ 210m primers and the mag w/ 215m primers

I just picked up on this @ work, I'll run some "Quicklload" calcs, @ home. It may be a few days.

One thing I can tell you, that RL22 load for 280 A.I. would probably make a good "starting load". I have run 62 grs or better through the "standard" 280, and I plan to increase that. It is hard to get enough RL22 into the "standard" 280 case to get dangerous pressure levels. Not impossible mind you, but it would be severly compressed.

thanks wildcat junkie. take your time. im in no hurry. just the lull of the winter starting and i plan to start experimenting with my stuff for next hunting season. i would really be interested in all your results and info you have with the 280 or 280 ackley. again thanks for your time.

not that this answers your original question,..but both RL22 and H4831sc have been STELLAR performers in my 280AI and 6.5-06AI.

I did reach pressure in the 280AI (don't have data with me) with RL22 but it was a healthy dose in a custom chambered 1:9 PacNor select match tube.

good choice,..one of my favorites