Wow! That is fast for the 260AI.
How many firings on the brass before it was toast?
Ackley Improved
- Thread starter Seabeeken
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How many firings on the brass before it was toast?
lancetkenyon
Well-Known Member
Vs the .280AI?
Well, yeah. Lower charge weights, lower pressure, and lower velocity=longer brass/barrel life.
lancetkenyon
Well-Known Member
This is a 20" .260AI w. 130 OTMs...and the Fury brass. I settled on the 3171fps load and went to stretch it out to 1109yds. They get to the target quick.
xsn10s
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I might switch to a 130gr. We'll see after I develope my 140gr,145gr, or 147gr hybrid loads.
shorthair1
Well-Known Member
I'm as guilty as most guy with AI cartridges in that the very first thing I do is to increase the pressure high enough to get the magic velocity number. I forget where I read it but it seems to hold pretty true that if you increase the case volume 4% that you gain 1% in velocity if you keep the same pressure. Look at the gains in the 30-06 just from raising the pressure to say 60,000 psi.
If you like running 180/200g in the 30/06, then the AI version with a 26" barrel is a wet dream. An upgrade would be a 338/06 AI.
Lance's 260 AI with the Sig 277 brass is a game changer.
Lance's 260 AI with the Sig 277 brass is a game changer.
I fired this test piece 5 times to see if I could find pressure and it blew the primer (Fed 210) at that velocity but the brass was still fine. This is the Sig Fury hybrid brass with the stainless steel case head.
The Sig hybrid brass is a game changer for all .308 size cartridges. I've since bought 500 pieces.
Std 280 Rem on a 24" barrel using a Nosler's most accurate load in manuals #3 and #4 with 160g bullets, IMR7828, FEDERAL 210 primer is 2930 fps, warm load. They dumbed down this cartridge due to pumps and semi-auto's. We had 4 Remingtons that shot this load, and the AI's are doing 3000 but with zero case trimming.
The standard and the AI, using Lapua brass or old Lake City Match brass formed from new, are a game changer in reducing upper-end pressures. A friend is shooting the 180g ELD-M in his 280 Rem with amazing results(2700 fps) using lapua brass, Rem 700, Wyatt's mag box, throated for 180s. The Std 280 only uses a smidge of powder, but you have to watch case growth vs ZERO with AI.
The standard and the AI, using Lapua brass or old Lake City Match brass formed from new, are a game changer in reducing upper-end pressures. A friend is shooting the 180g ELD-M in his 280 Rem with amazing results(2700 fps) using lapua brass, Rem 700, Wyatt's mag box, throated for 180s. The Std 280 only uses a smidge of powder, but you have to watch case growth vs ZERO with AI.
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QuietTexan
Well-Known Member
You need to look up the case, it's not all steel. The case HEAD is steel and the body is brass, it's a two piece case designed to run at 80,000 psi.
shorthair1
Well-Known Member
I am aware of the steel case head and still have doubts about resizing the case head. Maybe it's not a problem but I can be patient and wait for more information.
ntsqd
Well-Known Member
If it doesn't grow from being fired then it won't need to be resized.
There is no need to resize it. It doesn't expand, at least as far as I have pushed it.
