04-24-2020, 02:56 AM
Ask yourself the question: Does a Grendel barrel REALY need a dedicated break in exercise?
If the answer truly is YES and you want to use an oddball (for the Grendel) powder, then ask yourself the second question: Will this introduce unusual safety issues.
Velocity is not an issue if the goal is merely to send a bunch of bullets down range.
The biggest issue with 4350 is that the pressures will be low, even if one fills to the case mouth and compresses. Whether it will be low enough that significant unburned powder remains in the barrel remains to be seen.
Reported experiences with large cases and partial fills with slow powders might suggest that one should avoid initial loads that leave a significant unfilled volume.
If the answer truly is YES and you want to use an oddball (for the Grendel) powder, then ask yourself the second question: Will this introduce unusual safety issues.
Velocity is not an issue if the goal is merely to send a bunch of bullets down range.
The biggest issue with 4350 is that the pressures will be low, even if one fills to the case mouth and compresses. Whether it will be low enough that significant unburned powder remains in the barrel remains to be seen.
Reported experiences with large cases and partial fills with slow powders might suggest that one should avoid initial loads that leave a significant unfilled volume.
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"To those who have fought and almost died for it, freedom has a flavor the protected will never know."
-- Author Unknown
"If at first you do succeed, try not to look astonished!" -- Milton Berle