Trail Boss does not like to be compressed or to have fillers, My load for .308 sub is 8.5 grs I worked up to 12.0 grs and the accuracy went out the widow,
To work out the start load fill the case to the base of the neck 70% of this is your start load work backwards from there, start without
the surpressor just to be safe the bullets should be stabilised but you never know
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