Re: 300gr Bergers not grouping
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jmptx</div><div class="ubbcode-body">Partial Success in a DTA SRS
I have just started into load development with 300gr Bergers as well. With SRS the mags I am able to load the rounds out pretty much as far as I want. I went with a C.O.L. of 3.825" which by my calculations on my rifles is ~.03 off the lands. I hesitated to go longer only because I was worried I might cause issues, at it was my first time measuring seating depth.
I tested H1000 from 83gr up to 92.5gr, and saw better groupings at 200 yards with my 92 and my 92.5 charge. (92.0 is listed as max, but I was not seeing pressure signs, so I bumped up a bit) Both had 3 shot groups < 2 inches. I would not have been unhappy with that, except that the same rifle last week shooting 300gr Scenars with 104gr of H869 did a 3 shot group in ~.87" I seated the Lapua's at whatever the max depth in the books is listed at (3.7" or so I think).
I did not feel that I was shooting my best yesterday, so maybe the 92gr of H1000 with the 300gr Berger seated at 3.825" is better than I think.
Since I am rambling:
I am also not sure I like H1000 as much as H869, but I have heard a lot of good things about it so I decided to give it a try. I shoot 4 rounds per load test, 1st shot is a zeroing shot, then I shoot 3 for a grouping. If I was doing 2 shot groups I would be able to say I have <1" groups, but I always had at least 1 shot that pulled the number down. I don't normally see that in my shooting. It may have been a bad day, or maybe something else? </div></div>
I've worked up to nearly the exact same load as yours. 92gr H1000, 300gr Berger, .030" off the lands... With Lapua brass and CCI250 Mag Primers...
I get pretty consistant .3 MOA with this load.
210yards, 3 shot group, .596" CTC.
This is out of a 110BA.