I was doing an OCW test @ 200.
The groups had started to open up drastically the last load.
First shot, I saw a perpendicular 10' line of dust appear about 20' from the bench, and could not find the hole on the target. I figured what had happened, so I kept my left eye open and concentrated...
7PRC = Beltless 7RM.
For a 175-180gr bullet, expect:
20" @ 2850-2920
24" @ 2900-2980
26" @ 2940 to 3020
You might squeeze a hint more out of them if you lean on them.
If you like the 25s, and want more HP....
Again, 22" barrel, 135 Berger LRHT, shot # 115 from the barrel. This was max. First slight signs of pressure. I have backed it down to 3230fps.
With a 1:12" twist, I wouldn't go heavier than an 85gr cup and core or an 80gr mono. That is a SLOOOOW twist in a .257. 1:10" is the old school norm, good for the 115/120 range.
I want a Tangent Theta 4-20×50 that weighs 20oz, has a 34mm tube, 100 MILs of elevation adjustment, Gen 3XR Fine reticle, dual FP, 100% reliable, maintain their glass quality and tracking, and costs $500.
Norma Tac 22 Subsonic 40gr HP in mine.
Norma Tac 22 Subsonic 40gr RN in my daughter's.
I tried about 17-18 different types, and these are what shot best in ours. Several varieties of each from Augila, Eley, Lapua, CCI, Norma.
As noted above, some retailers have either reduced or free shipping when you order a certain amount of product.
Berry's Bullets is like that. I needed to order some plastic 50rd boxes. 10 of them. Came out to $70ish. Shipping as $150. I added an additional 4 boxes to bring the total to...