Light 65-75 gr & standard freebore/twist

[trdjohn]

Playing around with a pre-fit 6mm GT on Origin action now, and shooting heavies. I have an extra Origin SA. I've read so many good things about 6mm BR round I want to try it, to be clear this would NOT be a competition gun. Thinking about adding 6mm BR Norma barrel & shooting lighter bullets - plinking, trigger time/practice with cheaper bullets, some varmint shooting, yardages out to 300 or so. I've read numerous threads on zero freebore and standard (.090-.100) freebore. What are the lightest bullets usable with standard freebore and still shoot with decent accuracy? Can you go down to 65 gr VMax, 68 gr Bergers, 70 gr Nosler BT, 70 gr Sierra, 70 gr Speer, 72 gr Barnes, 75 grain VMax, are any of those jump tolerate? Can the jackets handle 8 twist?

Part of my issue is I live in Illinois. Until recently, we were a shotgun only deer state, now single shot straight wall deer rifles are okay. So not exactly the hot bed of bolt rifles or rifle-smiths; or I maybe just out of the loop if there are any good riflesmiths to work with here. (White Oak is mainly AR barrels). The point is pre-fit barrels are the easy button for me, most stock the longer freebore barrels, the zero freebore barrel seem to require picking a bullet and sending dummy rounds off to be chambered - that isn't the end of the world, but is my "catch-22" & why I'm asking about longer freebore/light bullets, it's the easy button.

 

[Murray Brook]

Shooting 65-75 gr bullets you would not need much freebore and certainly not need an 8 twist. In fact if you go no heaver than 75grs then a 12 twist would do. I have a 10 twist zero freebore 6 br and I find it work great Even with the zero freebore 65-68 gr bullets are not seated that far down the case neck and it's nice to have some room to lengthen your oal as the throat wears if need be. JMO.