07-06-2024, 11:23 PM
Welcome aboard! A 20" should do you well, Hornady has their data online at least they have for a while now...
I've had the 103 eldx in my 20" ARs at the high 2600's, 2675-90, with Lever, which is an excellent powder. The 105's should be somewhere around there too. The Hornady 105 Bthp needs to be seated a bit deep due to its kind of stubby ogive, but a berger vld will give you room.
I have a 105 Berger vld load but for a bolt action, where the pressures can go higher, 2720 for a 22" length.
If I scale it down to gas limits and 20", you could be in the 2660-70s, my ballistics says you're 1000 ke out to around 350 give or take... at higher altitudes of course maybe longer.
This is all with Lever powder.
I've had the 103 eldx in my 20" ARs at the high 2600's, 2675-90, with Lever, which is an excellent powder. The 105's should be somewhere around there too. The Hornady 105 Bthp needs to be seated a bit deep due to its kind of stubby ogive, but a berger vld will give you room.
I have a 105 Berger vld load but for a bolt action, where the pressures can go higher, 2720 for a 22" length.
If I scale it down to gas limits and 20", you could be in the 2660-70s, my ballistics says you're 1000 ke out to around 350 give or take... at higher altitudes of course maybe longer.
This is all with Lever powder.