Where are my fellow 450 Bushmaster Handloader s at?

[Ledslnger]

Have you 450 bushmaster guys noticed run out in the ar platforms if so how have you cured it ?
Friend has a AR in 450 bush and he noticed his bullets running forward after a couple shots they are crimped the same as factory. Any help would be great


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If factory rounds aren’t doing it and his are they are NOT crimped like factory. Try putting more crimp to it. Or, shoot factory ammo. Not many alternatives, sorry.