Folks using the 131 gr. Blackjack bullet...Which variant of the .257 are you shooting and how much free bore?
Blackjack Bullets
- Thread starter oldnmkid
- Start date
25x47 Lapua
BlackJack spec reamer.
.130" freebore
(Not shooting it yet, barrel is getting spun up)
Im shooting a 25 Creedmoor with .130 freebore. Ive got this thing dialed in all the way to 1 mile using 41.5grs of h4350 is netting me 2960fps. 6.8mils gets me to 1000yds, while 18.6 gets me to 1 mile. These bullets shoot lights out.
257 Rob AI. Being chambered and installed right now. Will report back soon as it gets here. Prob next week or the week after.
I am having a 25 saum built, reamer has .080" freebore. You do get that neck lengths play in freebore numbers, no one size fits all?
