260AI roll call

[msalm]

@msalm, you get anymore testing or shooting in over the weekend with your nephew's new 260AI?

I've been going over the historical data for this barrel and even had one of the best F/open shooters go over my targets (and thankfully confirmed my own analysis) to figure out where I should load to. I'm going to shoot 44.8gr with the new lot of primers at 2805fps at the next 1000 yard club match to confirm my info. I really can't test too much anymore before Western States as I need to get a solid feel for this new velocity.

Nothing yet, hopefully this fall yet but he’s a busy kid working and family affairs. With hunting seasons coming in, he’ll be busy with that too. I have high hopes for those 144gr Lapua bullets though, and well at least load up a ladder and check velocities and pressure in preparation for accuracy testing. I finished the rifle in time for his last evening match with friends and he dominated them quite handily…I believe it’ll be on the back burner until this spring

 

[Fast14riot]

Solidified my load in the new rifle at the last 1000y club match last weekend. Going to take this load to the Western States Championship in a couple weeks. Shot a 150-8, 149-11 and a 141-2. Last relay I took my two sighters in what was to be the last of the calm winds as it picked up from the 3-5 knots to well over 10 with gusts and fish tailing in my face after my first round for record. Put up an 8 when trying to figure it out during record string, lol!

Target is from my second string. The right 9 was all me. Saw the flags switch right as I pulled the trigger and knew it was going to be close. Load shoots good, just need to confirm some tuner settings if needed for weather changes.

260AI
Berger 153.5
Peterson SRP 10x fired
Rem 7-1/2
N555 44.8gr
2804fps avg
SD 3-5 over 22 rounds.

 

[Fast14riot]

Well the 260AI did me proud at the Western States Long Range Championship this past weekend. It held its own against a lot of big 7mms and magnums. Conditions were calm but far from benign. You had to really watch the mirage to stay centered up. It wasn't just an X ring contest, that's for sure. Get lazy and you could easily shoot a 9. I took honors in F/Open Master and shot a very competitive score against the HM group, too.

Load
Berger 153.5 -0.010
Peterson 260 SRP (mixed from 2x to 18x firings)
Rem 7-1/2 seated -.003 with slight crush
44.8gr N555 weighed to +0.04/-0.00gr

Atmospherics
Starting the day in 65°F, 29.20-29.33in/Hg, 55%rH
Ending the day at 80°F, 29.24-29.40in/Hg, 40%rH
Elevation 876' ASL
Winds light and highly variable

 

[swd]

Well the 260AI did me proud at the Western States Long Range Championship this past weekend. It held its own against a lot of big 7mms and magnums. Conditions were calm but far from benign. You had to really watch the mirage to stay centered up. It wasn't just an X ring contest, that's for sure. Get lazy and you could easily shoot a 9. I took honors in F/Open Master and shot a very competitive score against the HM group, too.

Load
Berger 153.5 -0.010
Peterson 260 SRP (mixed from 2x to 18x firings)
Rem 7-1/2 seated -.003 with slight crush
44.8gr N555 weighed to +0.04/-0.00gr

Atmospherics
Starting the day in 65°F, 29.20-29.33in/Hg, 55%rH
Ending the day at 80°F, 29.24-29.40in/Hg, 40%rH
Elevation 876' ASL
Winds light and highly variable

View attachment 1708345View attachment 1708346View attachment 1708347View attachment 1708348
View attachment 1708350

Don't forget paint by BC'z!

 

[Fast14riot]

Don't forget paint by BC'z!

Of course, and you for chambering all my barrels!

 

[swd]

Of course, and you for chambering all my barrels!

We all know pretty guns shoot better, LOL, and Brett is the king of making them pretty! I'd fire that crappy gunsmith..