I'm shooting Book load max charges ( Flattened primers) 75gr ELD in front of 25grs of Re#15.5 and I bolt locks open on very last shot When burning Alliant Power Pro 2000-MR (Again book max charges) 28.2 grs behind an 80.5 Berger full bore bullet the bolt doesn't lock open, Why? I'm pushing those bullets above 2900FPS and MOA accuracy. Again, why?
- Thread starter Iron Worker
- Start date
From my experience with Reloader 15.5 in 220 thunderbolt, which is similar to 224 Valkyrie, it is the best powder for that cartridge with those bullet weights. I would stick with the 15.5. The bolt carrier could be coming back off the buffer with enough force to jump over the bolt lock. You might want to disassemble and inspect your bolt, firing pin, carrier, and lower for any damage.
Bolt could certainly be traveling too fast if you're pushing the loads that hard.
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