I am hesitant to post this as it's not really an answer to the OP's question, but I'm going to throw it out there anyways.
I'm a big 6.5mm fan but have recently become even more impressed with .257 cartridges now that Berger has the 133 and 135 bullets. I've ran the numbers many times, and a .257 Berger 135gr being shot out of any of the aforementioned 6.5 parent cartridges will outperform the 6.5 version.
I'm shooting a 25 PRC and getting 3250fps from a 24" Bartlein with the 135s. One step to neck down 6.5 brass with a FL bushing die. Bullets are easy to find as of yet. Just something to consider.
I'm a big 6.5mm fan but have recently become even more impressed with .257 cartridges now that Berger has the 133 and 135 bullets. I've ran the numbers many times, and a .257 Berger 135gr being shot out of any of the aforementioned 6.5 parent cartridges will outperform the 6.5 version.
I'm shooting a 25 PRC and getting 3250fps from a 24" Bartlein with the 135s. One step to neck down 6.5 brass with a FL bushing die. Bullets are easy to find as of yet. Just something to consider.
Last edited: