Re: RCBS Charge Master
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Leaddog</div><div class="ubbcode-body">+/- .1 grain may be fine at 100 yards with the Chargemaster, but it's not cutting it at 1000 yards. </div></div>
Have you done a side-by-side test with throws from a chargemaster vs. those weighed to the +/- .02 gr?
Just askin'. I currently weigh to the nearest .02 gr, but it is a huge PITA, and I wonder if it actually makes a difference. I wanted to do a test one day. At my charge weight, I have measured the difference per tenth of a grain at 1.67 fps. So we are looking at a difference in ES of 1.67, which roughly makes a difference in SD of less than a foot per second... put that in JBM, and it changes my 175 SMK load by .3" and my Berger 185 LRBT load by the same. .3" is a big deal in benchrest at 100. When you are shooting at a 12" target at 1,000, I don't know if you are giving up a lot.
I am tossing around the idea of going back to the CM. I had one, then I started dumping with a Lee perfect powder measure and trickling up on a VIC-123. So I am getting Prometheus results, but it takes me a couple of hours to charge 75 cases.
I am not spending the money on a Prometheus unless I find a great deal... but I wonder if I am really leaving that much on the table vs. the Chargemaster... and I haven't heard of anyone chronying both side-by-side to see if there is truly a difference. Unfortunately, a lot of the reloading practices we follow get more consistency, but rarely are the gains in accuracy tested... so I was just wondering if you knew of anyone who had tested this.