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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
55 gr. Bullets at 600 Yards??? :confused:
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<blockquote data-quote="Stysh" data-source="post: 21396" data-attributes="member: 280"><p>Hi Guys. I'm new to this site, and although I don't shoot LD, I have a question that perhaps the expertise on this board can help me with . . . </p><p>I apologize in advance for the long post.</p><p></p><p>Last weekend I attended the Bridgeville Pistol & Rifle Club's 600 yard Oyster Shoot, a 'fun' 600 yard group shooting competition in Delaware. Competition consisted of shooting two 5-shot groups for group, with the smallest group to count. I am not a LD shooter, but dragged out my 6PPC benchrest rifle to shoot, just for fun. I also threw in my medium range (by my standards!) .22-250 Ackley varmint rifle and a few cartridges left over from summer groundhoggin', just to see what it would do. </p><p></p><p>Winds were relatively strong (15-25 mph), gusting and switching from left to right. The only flag was on a ~40 ft. flagpole at about 300 yards (almost useless). While driving down, I reviewed some ballistic tables for the .22, which showed that the .255 BC bullets should drift about 62" in a 15 mph 90 degree crosswind. Ouch!</p><p></p><p>As it turns out, the .22-250 Ackley, shooting moly coated 55 gr. Hornady VMax varmmint bullets at ~3800 fps first shot a 5 3/4" and then a 5" group to win this informal competition. Groups shot by other rifles included 5 1/8" and 6 3/8" groups by a Hi-Power shooter with a 6BR shooting 107 gr. Sierra's, and a 6 3/4" group from a .243 Ackley shooting 67 gr. BT Hollister bullets. No other groups were in the 5" or 6" range with few others below 10", although there were numerous .30 caliber rifles shot including a .300 Ultra, .300 WinMag, and 30BR. My small groups were not due to wind reading shooting skill(?), as I shot completely horizontal 10" and 11" groups with my 6PPC. </p><p></p><p>This has sort of rocked my world with respect to the windage ballistic performance of small, light, low BC bullets. By my reckoning, there is NO WAY that rifle with those bullets should have been able to shoot a 5" group in that wind, let alone two, and on a relative basis, should NOT have been able to shoot the smnallest group compared to the other rifles.</p><p></p><p>What was going on???</p><p></p><p>Stysh</p></blockquote><p></p>
[QUOTE="Stysh, post: 21396, member: 280"] Hi Guys. I'm new to this site, and although I don't shoot LD, I have a question that perhaps the expertise on this board can help me with . . . I apologize in advance for the long post. Last weekend I attended the Bridgeville Pistol & Rifle Club's 600 yard Oyster Shoot, a 'fun' 600 yard group shooting competition in Delaware. Competition consisted of shooting two 5-shot groups for group, with the smallest group to count. I am not a LD shooter, but dragged out my 6PPC benchrest rifle to shoot, just for fun. I also threw in my medium range (by my standards!) .22-250 Ackley varmint rifle and a few cartridges left over from summer groundhoggin', just to see what it would do. Winds were relatively strong (15-25 mph), gusting and switching from left to right. The only flag was on a ~40 ft. flagpole at about 300 yards (almost useless). While driving down, I reviewed some ballistic tables for the .22, which showed that the .255 BC bullets should drift about 62" in a 15 mph 90 degree crosswind. Ouch! As it turns out, the .22-250 Ackley, shooting moly coated 55 gr. Hornady VMax varmmint bullets at ~3800 fps first shot a 5 3/4" and then a 5" group to win this informal competition. Groups shot by other rifles included 5 1/8" and 6 3/8" groups by a Hi-Power shooter with a 6BR shooting 107 gr. Sierra's, and a 6 3/4" group from a .243 Ackley shooting 67 gr. BT Hollister bullets. No other groups were in the 5" or 6" range with few others below 10", although there were numerous .30 caliber rifles shot including a .300 Ultra, .300 WinMag, and 30BR. My small groups were not due to wind reading shooting skill(?), as I shot completely horizontal 10" and 11" groups with my 6PPC. This has sort of rocked my world with respect to the windage ballistic performance of small, light, low BC bullets. By my reckoning, there is NO WAY that rifle with those bullets should have been able to shoot a 5" group in that wind, let alone two, and on a relative basis, should NOT have been able to shoot the smnallest group compared to the other rifles. What was going on??? Stysh [/QUOTE]
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55 gr. Bullets at 600 Yards??? :confused:
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