280ai
- Thread starter t_rod
- Start date
Re: 280ai
I found RE-19 and RE-22 work best for velocity. H4831SC and H1000 worked best for accuracy in mine.
Start at about the medium load for the standard .280 and work up. If you are going to shoot long range bullets such as the Berger and JLK 180's or Sierra's for that matter as well, you might work up your first ladder with the bullet at or just into the lands. Anything off the lands will be safe for pressure (as long as it was safe at or into the lands) and will probably give you a little bonus as far as velocity goes.
I found RE-19 and RE-22 work best for velocity. H4831SC and H1000 worked best for accuracy in mine.
Start at about the medium load for the standard .280 and work up. If you are going to shoot long range bullets such as the Berger and JLK 180's or Sierra's for that matter as well, you might work up your first ladder with the bullet at or just into the lands. Anything off the lands will be safe for pressure (as long as it was safe at or into the lands) and will probably give you a little bonus as far as velocity goes.
Re: 280ai
I run 61 grains H4831sc, with the 162 Amax, with a 26" Rock barrel. I use Nosler brass, and am getting 3000fps.
I run 61 grains H4831sc, with the 162 Amax, with a 26" Rock barrel. I use Nosler brass, and am getting 3000fps.
Re: 280ai
Also let me add, this load does not show pressure in my rifle, but work up slowly, every chamber abd barrel are differant.
Also let me add, this load does not show pressure in my rifle, but work up slowly, every chamber abd barrel are differant.
Re: 280ai
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pwc001</div><div class="ubbcode-body">I run 61 grains H4831sc, with the 162 Amax, with a 26" Rock barrel. I use Nosler brass, and am getting 3000fps. </div></div>
It seems to me (as I'm not near my data from that rifle, let alone rifle) that I topped out at 59.5 grains with the JLK/Berger 168's touching the lands. Something you can kind of look for when you get to the top end of this cartridge. I believe I backed off to 58-58.5? or so, as I got a little better accuracy. Those seem to be some recurring milestones with the .280AI Just over 60 for 162's and just under 60 for 168's.
If you aren't noticing differences at the loads coming up to that point post some pics of your cartridges for some hopefully helpful diagnostics.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pwc001</div><div class="ubbcode-body">I run 61 grains H4831sc, with the 162 Amax, with a 26" Rock barrel. I use Nosler brass, and am getting 3000fps. </div></div>
It seems to me (as I'm not near my data from that rifle, let alone rifle) that I topped out at 59.5 grains with the JLK/Berger 168's touching the lands. Something you can kind of look for when you get to the top end of this cartridge. I believe I backed off to 58-58.5? or so, as I got a little better accuracy. Those seem to be some recurring milestones with the .280AI Just over 60 for 162's and just under 60 for 168's.
If you aren't noticing differences at the loads coming up to that point post some pics of your cartridges for some hopefully helpful diagnostics.
