LSR 7wsm 1,000 yds

[jeffbird]

Thanks to Chris Matthews and Bob Cauterucio for this result. Ok, I know you guys do this stuff pretty regularly, and I am not gonna BS everyone and say I do this all the time, but I pulled it off once and boy it sure was sweet so I just had to share. By way of fair disclosure, I shot over 30 rounds at clays on the 1,000 yard berm and so had the advantage of really studying the effect of the wind and what was going on with my shots which was my goal for the day. Once I felt like I had a vague clue, and only a very vague clue, I told myself I was going for the best I could do on paper. Group 1 and 2 were nothing special for this crowd. I cleaned and then fired these as the last of the day. I settled down, really concentrated on my position alignment, hold, trigger squeeze, and trying to feel the wind, and then gave it the best I had. Group 3 is a 5 shot group which has
"3" over each shot as it was the third group of my paper tries at the end of the day. The cold, clean bore shot is down by the 8 on the tape and marked with a "3 CCBS" and then the next four shots in a row have "3" over them for group 3. Group 4 was a three shot group shot on the heels of Group 3. After I saw these it was time to call it a day and not spoil my success. Don't know about how it will go next time (actually I do and it probably will stink), but it sure is nice when things fall just right every now and again.
Range 1,000 yards

[Ballistic64]

Sweet! Details,we need details. [img]/ubbthreads/images/graemlins/grin.gif[/img] Tell us about the gun and load you were using.Are you necking the 300 down?

[jeffbird]

It is Chris Matthews' built 7wsm on a trued R700 short action - a plain ole 7 wsm with W-W brass, F210M primers and RL22. 24" Broughton 5c 7 contour. McMillan A5 with NF 8x32 NP-R1. The loads normally clock at 2760 for the CCBS and 2800 after fouling, however the temps were at 41F when I fired these and based on having to add 1MOA in elevation to a total of 27 3/4, I estimate that the speeds dropped about 40 - 50 fps from my work-up chrono speeds done between 90 - 100F. I do not turn the necks, but I spent a LOT of time setting up my dies and presses to knock out run-out as best I could. I use two presses which I leave set up all of the time and never touch the dies now that I have them adjusted like I want them. Also, I spend a LOT of time really carefully uniforming the primer pockets and seating the primers with a Sinclair hand tool with a glued on stop to make sure the primers are at a uniform seating depth and pressure. Then, before shooting, I segregate the rounds for those with a max of .001" or less runout for my best efforts which is what you see above. I use Forster dies. Tried the Redding dies and just never could set them up to my satisfaction.

[Ballistic64]

Jeffbird,is that load approaching the warm end of things with the WSM?

[jeffbird]

No signs of pressure. I started off with H4831sc and F215M which is SLOW and not as tight. Switched to 61.1 gr of RL22 and F210M it added 150 fps and tightened things up. Sierra lists 61.3 of RL22 as max with mag primers and I wanted to keep it just under max as a safety margin of error. I worked up the loads when the temps were between 90 - 100F here in Texas to make sure I stayed out of trouble. If the bullets are touching the lands, it definitely will show some pressure issues. Pull the bullets just .010 off and life is great and never had any blips at all.

[bailey1474]

Don't let anyone tell you they do that all day everyday!!! We all know Chris builds a fine rifle but it takes some fine loading and shooting to do that. Great job!!!

[jeffbird]

Thanks. I am working on it.