RockyMtnMT
Official LRH Sponsor
We recently had a customer with a tight match chamber in a .264 caliber custom rifle. His tight match chamber is particularly tight and would not allow the shoulder of the 124g Hammer Hunter to enter the free bore, requiring a long jump to the lands and seating too much bullet in the case. As most of you know we cut our bullets to be .0005" over caliber. This is what our patented PDR design allows in order to seal the bore of loose barrels without creating over pressure in tight bores. Works perfectly as designed. What we did to fix this tight chamber problem was to redesign the bullet with the shoulder at caliber and taper the baring surface to the boat tail junction to the .0005" over caliber. This solved the chambering problem and allowed the bullet to be seated out properly.
I am not sure that we will ever run into another chamber this tight again, but the other benefit of doing this with our tangent ogive, is it will allow longer seating before touching the lands. Not sure if it will be noticeable, but technically it will reduce the initial engraving pressure slightly.
We are considering doing this to the entire line of bullets. Question to you all is, do you think this is a worthwhile endeavor? It will take Brian about an hour per program to make the changes, so not a small project. I don't think it will change anybody's existing loads, but I do think it will be a benefit for case capacity for future loading. Other than Brian's time to do this I think it is all positive. Give me your thoughts.
Read more: http://hammerbullets.boards.net/thread/624/shoulder-design-on-hammer-bullets#ixzz5rI4V0h00
I am not sure that we will ever run into another chamber this tight again, but the other benefit of doing this with our tangent ogive, is it will allow longer seating before touching the lands. Not sure if it will be noticeable, but technically it will reduce the initial engraving pressure slightly.
We are considering doing this to the entire line of bullets. Question to you all is, do you think this is a worthwhile endeavor? It will take Brian about an hour per program to make the changes, so not a small project. I don't think it will change anybody's existing loads, but I do think it will be a benefit for case capacity for future loading. Other than Brian's time to do this I think it is all positive. Give me your thoughts.
Read more: http://hammerbullets.boards.net/thread/624/shoulder-design-on-hammer-bullets#ixzz5rI4V0h00