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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Monolithic Bullet Accuracy
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<blockquote data-quote="royinidaho" data-source="post: 1202170" data-attributes="member: 2011"><p>Did some study on a Kiwi DCM thrread and adjusted my approach on Hammer Hunter 393 grain prototypes.</p><p></p><p>I'm running a 10 twist 30" PacNor.</p><p></p><p>A max load of 50 BMW gave 1/2 MOA at 300, 547, 849 and 1126 yards.</p><p></p><p>Switched to Reloder 50, a bit slower.</p><p></p><p>Went up to 146 grains and got 3125 FPS. Upped the charge to 146.6 and got 3126 FPS MV with the MagnetoSpeed V3. Onlty 1 FPS difference???</p><p></p><p>This is where I learned something about HBN coating processes. Story for another tiime.</p><p></p><p>With a different batch of HBN coated Hammer Hunters 146.3 grain of RL-50 gave 3109 FPS loafing along pressure wise.</p><p></p><p>Upped charge weight to 147 grains resulting in 3110 FPS. Me things a couple more inches of barrel is needed for this very slow powder.</p><p></p><p>The exciting thing about these two shots is that they grouped CTC at precisely 0.25 MOA @ 300 yards.</p><p></p><p>A bc input of 0.46 G7 is getting me close at 1126. This additional velocity reduces 1126 yard drop right at 1 MOA according to AB. Tomorrow will tell the tale. I'm confident I'll get good numbers for that distance and will then head out to 1661 yards.</p><p></p><p>I'm shooting only 2 shot groups as I'm running low on projectiles. Hint <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="royinidaho, post: 1202170, member: 2011"] Did some study on a Kiwi DCM thrread and adjusted my approach on Hammer Hunter 393 grain prototypes. I'm running a 10 twist 30" PacNor. A max load of 50 BMW gave 1/2 MOA at 300, 547, 849 and 1126 yards. Switched to Reloder 50, a bit slower. Went up to 146 grains and got 3125 FPS. Upped the charge to 146.6 and got 3126 FPS MV with the MagnetoSpeed V3. Onlty 1 FPS difference??? This is where I learned something about HBN coating processes. Story for another tiime. With a different batch of HBN coated Hammer Hunters 146.3 grain of RL-50 gave 3109 FPS loafing along pressure wise. Upped charge weight to 147 grains resulting in 3110 FPS. Me things a couple more inches of barrel is needed for this very slow powder. The exciting thing about these two shots is that they grouped CTC at precisely 0.25 MOA @ 300 yards. A bc input of 0.46 G7 is getting me close at 1126. This additional velocity reduces 1126 yard drop right at 1 MOA according to AB. Tomorrow will tell the tale. I'm confident I'll get good numbers for that distance and will then head out to 1661 yards. I'm shooting only 2 shot groups as I'm running low on projectiles. Hint :) [/QUOTE]
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