Flexy
07-06-2015, 01:18 PM
Hi there,
I'm brainstorming the right dimensions to order two molds from Mountain Molds... Bore riding diameter is what is bugging me. I already got some clarifying answers from Dan at MM... But what have you got to give me about this? Bore riding part would be seated within the brass, so it would not affect chambering of the round. I use the brass in only one gun, Marlin 1895 levergun 45-70 Gov, with micro grooving (12 grooves). So I dont need to resize them after shooting. I have used (and want to use) Lees Factory crimp tool for crimping. And Lees undersized molds, which had to be lapped severely to get the accuracy / get rid off keyholing... Also the push thru sizer had to be lapped to .4606 in the same tinkering session... After those, I got rid of keyholing and gained long distance accuracy.
OK, the question. The bore riding part, can it be larger than the bore diameter? I'm planning on using gas checks, so there should be no lead fouling because of the bigger than bore dia bore riding... And chambering issues should not arise, as that part would not be so far out the brass to meet the rifling after throat.
The main reasons for thinking about bigger than bore dia bore riding part is the fact that I've encountered some problems while lapping push thru sizing die and Lee undersized molds suitable for micro grooved barrel... namely the fact that bullet "fall" down in the brass during or after the crimping. I'm not using compressed load.
OK, thanks for any insights you might have. :)
I'm brainstorming the right dimensions to order two molds from Mountain Molds... Bore riding diameter is what is bugging me. I already got some clarifying answers from Dan at MM... But what have you got to give me about this? Bore riding part would be seated within the brass, so it would not affect chambering of the round. I use the brass in only one gun, Marlin 1895 levergun 45-70 Gov, with micro grooving (12 grooves). So I dont need to resize them after shooting. I have used (and want to use) Lees Factory crimp tool for crimping. And Lees undersized molds, which had to be lapped severely to get the accuracy / get rid off keyholing... Also the push thru sizer had to be lapped to .4606 in the same tinkering session... After those, I got rid of keyholing and gained long distance accuracy.
OK, the question. The bore riding part, can it be larger than the bore diameter? I'm planning on using gas checks, so there should be no lead fouling because of the bigger than bore dia bore riding... And chambering issues should not arise, as that part would not be so far out the brass to meet the rifling after throat.
The main reasons for thinking about bigger than bore dia bore riding part is the fact that I've encountered some problems while lapping push thru sizing die and Lee undersized molds suitable for micro grooved barrel... namely the fact that bullet "fall" down in the brass during or after the crimping. I'm not using compressed load.
OK, thanks for any insights you might have. :)