A “bunch”- or a few? And, having to use washers happens with factory stocks and the factory plastic BM too. And with multiple different aftermarket bottom metals. Is the factory stock off?
I have seen triple digits of Rokstocks- I have installed 50+ at S2H classes in front the students. One (1) has needed the rear action screw filed most likely due to the inlet being a bit shallow, 1 the screw was filed because we had no washers and the factory BM was pulling through, and several have needed washers with the factory BM. About the same numbers of factory stocks that have needed the same.
In that same time- 6 or 7x McMillans had the inlet off center, at least 4x Manners that were completely unusable without a full bed job out of 10-12.
I have been very critical of Stocky’s and UM openly- however, on this subject, it isn’t them that is out of the norm for the industry. I don’t give a rip about “finish” or a mold line or whatever- so on that, I don’t care and yall can argue all you want.
As for being able to remove factory stock, drop in Tikka, screw on BM and go- the Rokstoks have been far less headache in the last year than the other manufacturers. The only easier one is the KRG’s and they come with their own action screws and totally different BM.