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Rifles, Reloading, Optics, Equipment
7mm STW
7mm STW Reloading Thread
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<blockquote data-quote="jweigel" data-source="post: 1201787" data-attributes="member: 72021"><p>Kyron....how was your accuracy when at 80+ grains? </p><p></p><p>My go to load with 180s in my Sendero is 78 grains of Retumbo at .020 OTL which is at 3040 and .5 MOA out to 800 yards that I tested.</p><p></p><p>Just did a powder test (1 grain increments) of N570 and 180 VLDs. Started at 78 grains (3020 fps) 79 - 3047, 80 - 3121, 81 - 3168, 82 - 3215, 83 - 3280. One of the three rounds of 83 grains had a slight injector mark. But 82+ grains opened up to 2" plus MOA. I had decent accuracy at 80 grains.</p><p></p><p>Will shoot again as I feel I was more the issue then the gun. But 82 grains or less is my max. Day was 60 degrees. I use a shooting Chrony.</p><p></p><p>I also shot a three round with my go to 78 Grain retumbo load. It went 3044 which is spot on with my drops out to 800 yards, so I think the speeds are close to accurate.</p><p></p><p>The N570 is giving awesome groups and speed with my 7RM Sendero and 180 VLDs.</p><p></p><p>I looked back when I tested Retumbo last summer and I got to 79 grains and at or under 3100 fps when I had bolt lift and ejector marks. Looks like I can get more speed without pressure with N570.....but will not give up the .5 MOA I have with Retumbo if I can't get it with N570. I did have one N570 load that was near .5 MOA....but not a good shooting day for me.</p><p></p><p>Fun stuff</p><p></p><p>jjw</p><p>ND</p></blockquote><p></p>
[QUOTE="jweigel, post: 1201787, member: 72021"] Kyron....how was your accuracy when at 80+ grains? My go to load with 180s in my Sendero is 78 grains of Retumbo at .020 OTL which is at 3040 and .5 MOA out to 800 yards that I tested. Just did a powder test (1 grain increments) of N570 and 180 VLDs. Started at 78 grains (3020 fps) 79 - 3047, 80 - 3121, 81 - 3168, 82 - 3215, 83 - 3280. One of the three rounds of 83 grains had a slight injector mark. But 82+ grains opened up to 2" plus MOA. I had decent accuracy at 80 grains. Will shoot again as I feel I was more the issue then the gun. But 82 grains or less is my max. Day was 60 degrees. I use a shooting Chrony. I also shot a three round with my go to 78 Grain retumbo load. It went 3044 which is spot on with my drops out to 800 yards, so I think the speeds are close to accurate. The N570 is giving awesome groups and speed with my 7RM Sendero and 180 VLDs. I looked back when I tested Retumbo last summer and I got to 79 grains and at or under 3100 fps when I had bolt lift and ejector marks. Looks like I can get more speed without pressure with N570.....but will not give up the .5 MOA I have with Retumbo if I can't get it with N570. I did have one N570 load that was near .5 MOA....but not a good shooting day for me. Fun stuff jjw ND [/QUOTE]
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7mm STW
7mm STW Reloading Thread
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