Unfortunately you arenât in possession of all of the facts! The 7 PRC was designed to shoot 185 to 195 low drag bullets. That is the why the 7 PRC SAAMI chamber has a free bore of .233. That is why the 7 PRC case is 2.280â. That is why the 7 PRC must be a
Long Action Cartridge. The math works out that the 175 and 180 factory ammo are jumping alooong ways in the 7 PRCâŚ.
The maximum SAAMI cartridge length for a long action is 3.34â. All long action factory ammunition cannot exceed 3.34â. That is why you wonât see any 7 PRC heavy for caliber, high BC bullets in factory ammunition. That is why you will not see any high BC bullets heavier than 180 gr in 7 PRC factory ammunition.
A standard long action tikka mag is limited to a cartridge length of 3.37â. You can get after market mags that will give 3.40â. To reliably feed in a Tikka T3x action, the maximum cartridge length possible is 3.47â. But to get that 3.46-47â you will need to either drop the barreled action into a chassis or get AICS bottom metal and carve out the mag well inlet on a factory T3x stock. Either way you look at it it is a $700+ modification and you still wonât be able to effectively load the .284 heavies in a T3x Action.
This is what Ryan Furman (Long Range Only) has to say about the 7 PRC:
âAt SAAMI length, the 7mm PRC will fit inside the 3.4â magazine boxes of last centuryâs design in SAAMI form. With the larger bullets, it will exceed the 3.4â magazine, but will not need a Wyattâs box.â
The math works out better with this load: â180 Berger Hybrid - 020 off the lands 3.433" COAL in a SAAMI chamber. This is a sub .5 mo load but not quite as accurate as the lower node with the 180
Hybrid and H1000â
DISCLAIMER: This is a guide. Everything listed within is for information purposes only. All loads should be worked up carefully. We have seen loads that require as much as two grains of charge weight adjustment from one powder lot to another. We have seen as much as five grains of powder...
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