04-17-2021, 11:19 PM
TV, the H in SAAMI-H stands for Hybrid chamber. My chamber is stock SAAMI except the freebore is a touch more than SAAMI in an attempt to address the issues with short chambers guys were experiencing with early lots of Hornady 105gr HPBT factory ammo. It also allows handloaders to seat the bullet out farther to load to longer overall lengths which allows for slightly more powder — while obeying the laws of pressure! — or slightly less-compressed powder. It allows the lighter bullets with blunter ogives to also be seated out farther without hitting the lands, allowing for more powder. All good things....
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