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7mm Remington Ultra Mag
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<blockquote data-quote="oldmossy" data-source="post: 636053" data-attributes="member: 44047"><p>I am shooting the 180 vlds in my factory sendero. The very first 5 shot group fired from this rifle was .56 at 100yds with 90 grains of retumbo. The second 5 shots was with 91 grains and the first 3 shots were in the same hole. Error on my part I believe opened the group to an inch with last two shots. That was during the summer in 90 degree weather. Since I am a hunter, I waited until this winter to make sure of the loads before loading a bunch of ammo that didn't perform like it did in hot weather. Since cold weather arrived, I have not been able to get any better than 2" at 200.And not much better than that at 100. I have tried more loads than I wanted- all being with 180 vlds and retumbo powder. Powder charges from 90-93 grains with no signs of pressure and chronoed speeds in the low 3300s with the 93 charge. The powder charge nor bullet seating has not affected the size of my groups. Almost all groups are of near equal size. I am also using CCI large rifle magnum primers. I'm also worried about the speeds being to fast now, and even though I just ordered some 168s, may not even worry with them. After reading Allens blogs, I may just stick with the 93 grain charge and get off the bench and see how it performs out ot 1000. I'm not wanting to replace my barrel. I've also sent an email to berger asking them about the speed of my 180 to see if I need to slow it down. Another guy was telling me about the second shock wave??? Its on my "how fast is too fast-bergers" blog.Hope I did'n ramble on too much.</p></blockquote><p></p>
[QUOTE="oldmossy, post: 636053, member: 44047"] I am shooting the 180 vlds in my factory sendero. The very first 5 shot group fired from this rifle was .56 at 100yds with 90 grains of retumbo. The second 5 shots was with 91 grains and the first 3 shots were in the same hole. Error on my part I believe opened the group to an inch with last two shots. That was during the summer in 90 degree weather. Since I am a hunter, I waited until this winter to make sure of the loads before loading a bunch of ammo that didn't perform like it did in hot weather. Since cold weather arrived, I have not been able to get any better than 2" at 200.And not much better than that at 100. I have tried more loads than I wanted- all being with 180 vlds and retumbo powder. Powder charges from 90-93 grains with no signs of pressure and chronoed speeds in the low 3300s with the 93 charge. The powder charge nor bullet seating has not affected the size of my groups. Almost all groups are of near equal size. I am also using CCI large rifle magnum primers. I'm also worried about the speeds being to fast now, and even though I just ordered some 168s, may not even worry with them. After reading Allens blogs, I may just stick with the 93 grain charge and get off the bench and see how it performs out ot 1000. I'm not wanting to replace my barrel. I've also sent an email to berger asking them about the speed of my 180 to see if I need to slow it down. Another guy was telling me about the second shock wave??? Its on my "how fast is too fast-bergers" blog.Hope I did'n ramble on too much. [/QUOTE]
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