Yes I have two different kinds of gg 20 to 1 from buffalo arms. Like I said I have had a long battle of getting this lock right and could not shoot or try them. Got to get my gun up to a gunsmith that has a milling machine and dial indicate the soul sight stem to the barrel for perfect 90 degrees to a level barrel. Did just ordered a 451 resizing die from lee to go along with my 449 and 450. Thanks.