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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bolt lug contact and amount of free float
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<blockquote data-quote="Tac-O" data-source="post: 1912442" data-attributes="member: 109994"><p>I understand that. From what I've see in my groups, I can't find any definitive walking when the barrel warms up. On the best group, I had the barrel pretty warm on shots 4, 5, 8, and 9 and they landed close to zero. </p><p></p><p>I think I may get to go to the range again today. I have 20 of the same load worked up, same number of firings on brass. Since I won't have to do any zeroing shots, my plan is to shoot two 10 round groups to see if the same pattern emerges on the second group, but of course letting the barrel cool after 4 or 5 shots.</p><p></p><p>What I'll be concentrating the most on to hopefully fix that large stringing is:</p><p>1. consistent shoulder placement of the recoil pad - sounds easy, but at the bench it seems having identical placement each time helps</p><p>2. consistent body position to make recoil as consistent as possible</p><p>3. extra focus on second group when I'm starting to feel tired - I concentrated extremely hard on shots 4-8 on the worst group because I could feel I was getting tired and they were better than the first 3</p><p>4. parallax error - I've always been under the impression that you're eye is positioned correctly when you have the shadow around the edges of the image removed, so this is what I check for. I can move my head around slightly side to side and still not have any shadow show up but I'm not good at detecting any reticle float when doing this (if there is any). So, I'll be focusing on getting my eye into the exact same position each time. My scope is fixed parallax at 150yds, so I'm not sure if parallax error could result in that large amount of shot dispersion you see in the stringing group.</p></blockquote><p></p>
[QUOTE="Tac-O, post: 1912442, member: 109994"] I understand that. From what I've see in my groups, I can't find any definitive walking when the barrel warms up. On the best group, I had the barrel pretty warm on shots 4, 5, 8, and 9 and they landed close to zero. I think I may get to go to the range again today. I have 20 of the same load worked up, same number of firings on brass. Since I won't have to do any zeroing shots, my plan is to shoot two 10 round groups to see if the same pattern emerges on the second group, but of course letting the barrel cool after 4 or 5 shots. What I'll be concentrating the most on to hopefully fix that large stringing is: 1. consistent shoulder placement of the recoil pad - sounds easy, but at the bench it seems having identical placement each time helps 2. consistent body position to make recoil as consistent as possible 3. extra focus on second group when I'm starting to feel tired - I concentrated extremely hard on shots 4-8 on the worst group because I could feel I was getting tired and they were better than the first 3 4. parallax error - I've always been under the impression that you're eye is positioned correctly when you have the shadow around the edges of the image removed, so this is what I check for. I can move my head around slightly side to side and still not have any shadow show up but I'm not good at detecting any reticle float when doing this (if there is any). So, I'll be focusing on getting my eye into the exact same position each time. My scope is fixed parallax at 150yds, so I'm not sure if parallax error could result in that large amount of shot dispersion you see in the stringing group. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bolt lug contact and amount of free float
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