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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
243 win, IMR 4451, RL 26 velocity results
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<blockquote data-quote="243winxb" data-source="post: 1818787" data-attributes="member: 97793"><p>Old post warning......</p><p></p><p>IMR 4451 IN 243 Winchester. Sierra 85gr hpbt #1530.</p><p></p><p>Rifle- Remington 600 Mohawk. 18" bbl.</p><p></p><p>Rem brass, Redding fl bushing die, no expander. .270" bushing.</p><p></p><p>CCI Br2 primer . Flash hole uniformed. Temperature 40 degrees. No wind.</p><p></p><p>100 yards IMR 4451 -44.0 GR 5 shots = .905" The first shot from clean barrel opened group. Just measuring the 4 =.482"</p><p></p><p>IMR 4451 - 44.5grs = 5 shots -.733"</p><p></p><p>Col 2.640" Sizing only 1/2 of the necks with the bushing.</p><p></p><p>Fired 1 round of each at 45.0 & 45.5grs to look for pressure. Seen no pressure signs.</p><p></p><p>I don't see any less copper fouling with this powder? Very old factory barrel. Many rounds fired.</p><p></p><p>I worked up from 37.5grs. because of Hodgdons 90gr bullet data for safety. It was a long road , working up.</p><p>I suggest working up using the Hodgdons/Sierra 80 gr data. <strong>Do so at your own risk. Be safe.</strong></p><p><img src="http://forum.accurateshooter.com/attachments/20200127_092258-jpg.1154171/" alt="20200127_092258.jpg" class="fr-fic fr-dii fr-draggable " style="" />[ATTACH=full]171986[/ATTACH]</p></blockquote><p></p>
[QUOTE="243winxb, post: 1818787, member: 97793"] Old post warning...... IMR 4451 IN 243 Winchester. Sierra 85gr hpbt #1530. Rifle- Remington 600 Mohawk. 18" bbl. Rem brass, Redding fl bushing die, no expander. .270" bushing. CCI Br2 primer . Flash hole uniformed. Temperature 40 degrees. No wind. 100 yards IMR 4451 -44.0 GR 5 shots = .905" The first shot from clean barrel opened group. Just measuring the 4 =.482" IMR 4451 - 44.5grs = 5 shots -.733" Col 2.640" Sizing only 1/2 of the necks with the bushing. Fired 1 round of each at 45.0 & 45.5grs to look for pressure. Seen no pressure signs. I don't see any less copper fouling with this powder? Very old factory barrel. Many rounds fired. I worked up from 37.5grs. because of Hodgdons 90gr bullet data for safety. It was a long road , working up. I suggest working up using the Hodgdons/Sierra 80 gr data. [B]Do so at your own risk. Be safe.[/B] [IMG alt="20200127_092258.jpg"]http://forum.accurateshooter.com/attachments/20200127_092258-jpg.1154171/[/IMG][ATTACH type="full"]171986[/ATTACH] [/QUOTE]
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243 win, IMR 4451, RL 26 velocity results
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