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yes AND no..... depends on loads ,projectile weights and where you getting data from... if you are a couple of grains below maximum for the hogdgon version you be close to max for the IMR...

in the 80s and early 90s the manufactures were MAKING them that length.....eg my model 70 lightweight poohseventy left factory at 21" as did many many others.... heck fellas on this forum are...

thought for the day........ we have seen huge amount of barrels chopped in last few years...and folks are starting to question wisdom of doing so....I wonder if circumcision's will undergo same...

AR2213sc works just great... same rifle as yours... still working on accuracy
use your 100grn for big game and keep your 90s for everything else.
we decided after much head scratching to just use...