7 Rem Mag Ackley Imp ??

[xsn10s]

Honestly that would be it. My 7RM runs pretty decent as it is. 2950-ish with 180's. Slight improvement to performance and cut down on the need to trim. If I was lookng to get into that 3100+ range I'd probably
Just go with a 28N or 7-300 PRC.

I just started on my 260 AI. Basically neck sized but there's no drag on them while closing my bolt. And just around .002" growth in case length. We'll see how they perform on the next loading. No growth would be a major benefit.

 

[xsn10s]

This is my 7RM. 24" 1:8.4T runs 180 hybrids at 2950-ish with 4831SC.

View attachment 445758

I'm happy with the way it performs. Minimal recoil. Decent barre life.

Data for mine @ 900' DA. 7 mph Wind

View attachment 445760

Oh heck yeah!!!

 

[1mechanic]

I don't have a 7RM but I do have a 264 WM AI.

3350 with 156 Bergers in a 28" Proof barrel. Throated at 3.550" COAL.

Have you ever loaded the 143 grain ELD-X and if you did what fps did you get?

 

[StanleyActual]

I don't have a 7RM but I do have a 264 WM AI.

3350 with 156 Bergers in a 28" Proof barrel. Throated at 3.550" COAL.

That looks like a blast to shoot!

 

[Mike D Texas]

Have you ever loaded the 143 grain ELD-X and if you did what fps did you get?

No. I've only loaded the 156 Berger (what it's throated for) 127LRX and 125 CE Lazer. The 125 CE Lazer shoots phenomenal with no tuning and 3600+ fps.