75 HP or 70 HPBT

[achi27]

Hi,
I've a custom rifle in .243 Win, with 1/13" barrel twist. I'm going to use it at 100,109 yards), 200,218 yards) and 300,327 yards) mt.
I thought Sierra HP 75 will be the best choice. Is it correct? Or can I have better result by using the 70 gr HPBT?
I'm reloading Nosler custom brass, with CCI BR2 primers and IMR 4320 powder.

Thanks for any support!

 

[fdshuster]

achi27: The Sierra 75 gr. HP #1510 has always been an accuracy performer for me in 243 Win., 6mm22-250, & my 6BRs'. Limiting it to 300 yd max. it gives up nothing in group sizes, in my rifles) to more expensive match bullets. 37 grs. of IMR 3031, seated .020" off the lands, Shilen & Douglas barrels, was my standard accuracy load, in the 243 Win., before the barrels were burned-out at 1400 rds.