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Rifles, Reloading, Optics, Equipment
Gunsmithing
Custom Rifle accuracy expectations??
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<blockquote data-quote="SBruce" data-source="post: 650523" data-attributes="member: 21068"><p>Well, it was calm yesterday morning. I went and set up at 100 yds, then 300 yds. I fired 13-4 shot groups over the period of a couple hours. Long story short, only 1 of the 13 groups was under 1 moa, it was 1/2 moa at 300 yds, and I couldn't duplicate it again.</p><p>Average group size for the entire test was 1 to 1 1/2 MOA.</p><p> </p><p>Shot 4 groups of the "recommended load" of 68 grns R-22 with 165 Nosler BT at the recommended OAL, along with a few groups of the same powder charge below the 165 Nosler Accubond, and also the 175 Berger VLD Hunting at the same .005" off the lands. I included one group each of two different 180 grn Factory ammo and the 165 Nosler BT ahead of 66 grns of H-4350.</p><p> </p><p>It was calm, with any slight wind felt being directly behind me from 6:00. Shooting with surveyors ribbon tied to the target backer for a wind flag at the target. BR Harris bipod (locked with a pod lock) with rear bag on the bench.</p><p> </p><p>All groups were more horizontal than vertical. Horizontal is where the problem is, and that's also where the problem was before sending it back. Seems the return trip helped some, but didn't turn this into the 1/2 minute shooter I was expecting. It's not placing the first two shots together and then throwing out the last two either, it's just plain big groups.</p><p> </p><p>I guess I am down to treating this rifle like a factory rig and doing a complete load work up program. Perhaps this rifle just doesn't like me and I need to have another smith shoot and evaluate it, but there are 3 other custom builds I am currently working with that will shoot (on average) around 1/2 minute with random picked loads. They occasional give 1/4 minute performance or less, and occasionally 3/4 minute or more, but an honest 1/2 minute 3 shot group (at ranges from 100 to 500) is not uncommon at all for these other guns.......with no load work up done so far, just forming brass and burning up some old powder and bullet lots.</p><p> </p><p>For broadside big game out to maybe 500 yds, this gun (as it currently shoots for me) will work, but so would a great number of factory rifles. MOA is nothing to be impressed with IMO. On the good side, <em>it is</em> "1/2 minute capable" .....................if 1 out of 13 counts, LoL!!</p></blockquote><p></p>
[QUOTE="SBruce, post: 650523, member: 21068"] Well, it was calm yesterday morning. I went and set up at 100 yds, then 300 yds. I fired 13-4 shot groups over the period of a couple hours. Long story short, only 1 of the 13 groups was under 1 moa, it was 1/2 moa at 300 yds, and I couldn't duplicate it again. Average group size for the entire test was 1 to 1 1/2 MOA. Shot 4 groups of the "recommended load" of 68 grns R-22 with 165 Nosler BT at the recommended OAL, along with a few groups of the same powder charge below the 165 Nosler Accubond, and also the 175 Berger VLD Hunting at the same .005" off the lands. I included one group each of two different 180 grn Factory ammo and the 165 Nosler BT ahead of 66 grns of H-4350. It was calm, with any slight wind felt being directly behind me from 6:00. Shooting with surveyors ribbon tied to the target backer for a wind flag at the target. BR Harris bipod (locked with a pod lock) with rear bag on the bench. All groups were more horizontal than vertical. Horizontal is where the problem is, and that's also where the problem was before sending it back. Seems the return trip helped some, but didn't turn this into the 1/2 minute shooter I was expecting. It's not placing the first two shots together and then throwing out the last two either, it's just plain big groups. I guess I am down to treating this rifle like a factory rig and doing a complete load work up program. Perhaps this rifle just doesn't like me and I need to have another smith shoot and evaluate it, but there are 3 other custom builds I am currently working with that will shoot (on average) around 1/2 minute with random picked loads. They occasional give 1/4 minute performance or less, and occasionally 3/4 minute or more, but an honest 1/2 minute 3 shot group (at ranges from 100 to 500) is not uncommon at all for these other guns.......with no load work up done so far, just forming brass and burning up some old powder and bullet lots. For broadside big game out to maybe 500 yds, this gun (as it currently shoots for me) will work, but so would a great number of factory rifles. MOA is nothing to be impressed with IMO. On the good side, [I]it is[/I] "1/2 minute capable" .....................if 1 out of 13 counts, LoL!! [/QUOTE]
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