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The Range
Ammo & Reloading
Cast bullets in 45 AR / ACP
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<blockquote data-quote="Master Carper" data-source="post: 3344906" data-attributes="member: 15527"><p>From left to right -</p><p></p><p>RCBS 45-300 FN GC / Red</p><p></p><p>Lee 452-255 RF / Red</p><p></p><p>Lee TL 452-230 TC / Green</p><p></p><p>Lee TL 452-230 TC / Red</p><p></p><p><img src="https://i193.photobucket.com/albums/z132/HonkerHunter_photos/2020%20STUFF/20200218_131123-1_zpsrifq8gr0.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>[ATTACH=full]158197[/ATTACH]</p><p></p><p>All bullets were shot in 3-shot groups @ 50 yards from a solid shooting bench.</p><p></p><p>Bullet velocities were as follows:</p><p></p><p>Lee TL 452-230 TC -</p><p></p><p>750 fps.</p><p></p><p>800 fps.</p><p></p><p>850 fps.</p><p></p><p>900 fps.</p><p></p><p>950 fps.</p><p></p><p>Lee 452-255 RF -</p><p></p><p>700 fps.</p><p></p><p>800 fps.</p><p></p><p>900 fps.</p><p></p><p>1,000 fps</p><p></p><p>RCBS 45-300 FN</p><p></p><p>600 fps.</p><p></p><p>700 fps.</p><p></p><p>800 fps.</p><p></p><p>Now my question! Why will my gun shoot so accurately with jacketed bullets, but will NOT accurately shoot cast bullets?!?!</p><p></p><p>2 different jacketed bullets and weights shot like this at 125 yards:</p><p></p><p>[ATTACH=full]158198[/ATTACH]</p><p></p><p>The bore/groove diameter on my barrel is .4420/.4510 and the bore was lead lapped before the chamber or crown was cut, so there are no rough spots in the bore.</p><p></p><p>Best cast bullet accuracy was 3" @ 50 yards, with the average accuracy being 5" or more @ 50 yards!</p><p></p><p>Bullet diameters tested for the 3 bullets shown above was .450 .451 .452 and .453</p><p></p><p>With accuracy being so bad with the cast bullets, I thought something may have came loose on the gun, I decided to shoot my last three SLEDGE HAMMER loads before leaving the range, so everything was exactly the same as what it was when testing the cast bullets. 3-shots @ 50 yards were measured outside to outside, minus bullet diameter, for a group size of .110" which is just under an 1/8" at .125</p><p></p><p>I repeat my question - Why will my gun shoot so accurately with jacketed bullets, but will NOT accurately shoot cast bullets?!?!</p></blockquote><p></p>
[QUOTE="Master Carper, post: 3344906, member: 15527"] From left to right - RCBS 45-300 FN GC / Red Lee 452-255 RF / Red Lee TL 452-230 TC / Green Lee TL 452-230 TC / Red [IMG]https://i193.photobucket.com/albums/z132/HonkerHunter_photos/2020%20STUFF/20200218_131123-1_zpsrifq8gr0.jpg[/IMG] [ATTACH=full]158197[/ATTACH] All bullets were shot in 3-shot groups @ 50 yards from a solid shooting bench. Bullet velocities were as follows: Lee TL 452-230 TC - 750 fps. 800 fps. 850 fps. 900 fps. 950 fps. Lee 452-255 RF - 700 fps. 800 fps. 900 fps. 1,000 fps RCBS 45-300 FN 600 fps. 700 fps. 800 fps. Now my question! Why will my gun shoot so accurately with jacketed bullets, but will NOT accurately shoot cast bullets?!?! 2 different jacketed bullets and weights shot like this at 125 yards: [ATTACH=full]158198[/ATTACH] The bore/groove diameter on my barrel is .4420/.4510 and the bore was lead lapped before the chamber or crown was cut, so there are no rough spots in the bore. Best cast bullet accuracy was 3" @ 50 yards, with the average accuracy being 5" or more @ 50 yards! Bullet diameters tested for the 3 bullets shown above was .450 .451 .452 and .453 With accuracy being so bad with the cast bullets, I thought something may have came loose on the gun, I decided to shoot my last three SLEDGE HAMMER loads before leaving the range, so everything was exactly the same as what it was when testing the cast bullets. 3-shots @ 50 yards were measured outside to outside, minus bullet diameter, for a group size of .110" which is just under an 1/8" at .125 I repeat my question - Why will my gun shoot so accurately with jacketed bullets, but will NOT accurately shoot cast bullets?!?! [/QUOTE]
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