Bavarianbrit
Well-Known Member
I have found myself again in the position of having to shorten a die. I have found that in order to get the 7.65x53 Argentine FL resizing die setting the case shoulder the way that I want it, the problem was that I couldn't quite chamber the sized brass. I've had to grind the bottom of the die down somewhat in order to get the case far enough up in the die to do what I need. In other words, the dies as delivered have been bottoming out on my press before I got the shoulder bump that I wanted.
This first showed up when using my Rockchucker press and I took some material off from the bottom of the sizing die which got me to where I wanted to be but having now moved on to a 120mm Prazipresse the problem has reappeared.
My first thought was that I had somehow done something wrong with my press and that was causing this issue, but the press shows no obvious signs of it, and apart from that, looking at the design of the press it is hard to imagine a problem there. Regarding the die adjustment that I am aiming for it is the typical .001-.002" shoulder bump based from cases fired in my two 7.65x53 rifles.
The cases are being reformed from 8x57 once fired cases simply as over here they come free as pickups often RWS from the local range, the forming works butter smooth except for the shoulder bump measuring out at being 0.014 thou too long compared to a 7.65x53 military case, the cases are first shortened as the neck would be too long. I'm using a Mitutoyo analogue vernier and the Hornady head space comparator bushings. To me the solution was to take a block of thick ply then drill a vertical hole through it on my decent vertical drill press which turns out to give a slightly too large hole then I wrapped masking tape around the die threads to get a tightish fit into this hole, then I moved over to my belt sander and took 0.014 off the bottom of the die while rotating the die in the hole. Which has worked out very well, the 14 thou was slowly removed, now in theory this must be pushing the case 0.014 thou further up into the die = the shoulder must be going the 0.014 thou I want further back.
This first showed up when using my Rockchucker press and I took some material off from the bottom of the sizing die which got me to where I wanted to be but having now moved on to a 120mm Prazipresse the problem has reappeared.
My first thought was that I had somehow done something wrong with my press and that was causing this issue, but the press shows no obvious signs of it, and apart from that, looking at the design of the press it is hard to imagine a problem there. Regarding the die adjustment that I am aiming for it is the typical .001-.002" shoulder bump based from cases fired in my two 7.65x53 rifles.
The cases are being reformed from 8x57 once fired cases simply as over here they come free as pickups often RWS from the local range, the forming works butter smooth except for the shoulder bump measuring out at being 0.014 thou too long compared to a 7.65x53 military case, the cases are first shortened as the neck would be too long. I'm using a Mitutoyo analogue vernier and the Hornady head space comparator bushings. To me the solution was to take a block of thick ply then drill a vertical hole through it on my decent vertical drill press which turns out to give a slightly too large hole then I wrapped masking tape around the die threads to get a tightish fit into this hole, then I moved over to my belt sander and took 0.014 off the bottom of the die while rotating the die in the hole. Which has worked out very well, the 14 thou was slowly removed, now in theory this must be pushing the case 0.014 thou further up into the die = the shoulder must be going the 0.014 thou I want further back.
