280AI 168gn or 180gn

[Sub MOA Hunter]

Hi Team

I have a custom Built Dan Hardy 280AI Long Range Rig with 26" 1:8 Barrel suppressed,
Im Shooting 180 Berger's using 56.5gn of ADI powder and only getting 2640ft if I go to 57gn and the primer is starting to crown as it flows into the firering pin although the primers are still slightly rounded (is this too hot?)

I stopped at 57.5gn which cronyed at 2675fps before going back to 56.5gn
I was really hoping to get at least 2700fps can I push to 58+gn or do I need to see if The 168gn will give me less wind deflection due to its farster Velocity

At what velocity do we need to get the 180 bergers to before they out preform the 168s in the 280AI in Wind deflection

Thanks

 

[LRangepro]

Did you ever get it shooting better? 180s aren't that much better than 168s at 280AI velocity...but you should be able to beat 2640, however, every barrel is different...some might not do it without pressure. the 8 twist is hurting you too. I have a 27" 9 twist and I get over 3000 pretty easy.