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Rifles, Reloading, Optics, Equipment
Reloading
Fire forming options
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<blockquote data-quote="Tac-O" data-source="post: 2363205" data-attributes="member: 109994"><p>I know this topic has been covered many times on this forum, but I wanted to go over it a bit here to look at my options, taking into account costs, powders I have on hand, and benefits/drawnacks of different methods.</p><p></p><p>I'm doing an AI 30-284. The virgin brass should headspace off the neck/shoulder junction with a 0.004 crush fit per Ackley's method. 284 already has a 35* shoulder and I'm going to 40* and blowing the shoulder walk out by a total of 0.010. so, there won't be a huge difference from straight 284... About 2.5-3gr. </p><p></p><p>Powders I have on hand</p><p>Trail boss</p><p>Aa5744</p><p>IMr 4227</p><p>Imr 4451</p><p>H4350</p><p></p><p>Bullets, I plan to shoot 175-200gr in the end, but local shops have 110-150gr bullets available pretty cheaply.</p><p></p><p>COW</p><p>It seems this would be the cheapest easy option and if using the lubing technique [USER=4191]@phorwath[/USER] mentioned in his FF thread, I should be able to get a full forming from 1 session and low pressure loads. With the crush fit, I may not have to lube to get a full form on 1 session.</p><p></p><p>Drawbacks</p><p>Don't get shooting practice</p><p>Messy</p><p>May not get consistent results for brass OAL change based on [USER=101859]@Alex Wheeler[/USER] post on accurate shooter forum.</p><p>Supposedly there can be some type of danger from caking or something inside the chamber or something? Not sure on this one. </p><p>I don't know if TB, 4227, or 5744 would be appropriate for COW.</p><p></p><p>Hydro die</p><p>Cheaper in the long run</p><p>Don't have to go to the range or elsewhere to FF</p><p>No wear on barrel</p><p></p><p>Drawbacks</p><p>I only use a Lee hand press for loading. Not sure if I could built a platform or something with my bench vise to mount the die.</p><p>Wouldn't be an exact match to chamber unless I send them my reamer or FF brass? Have them build it with lengthened shoulder dimension and then run it through my FL die?</p><p></p><p>Full pressure FF</p><p>Easy and get practice</p><p>With small change in case capacity, velocity might not be that far off so I could still have fun/hunt with them</p><p>Likely a full forming in 1 session?</p><p></p><p>Drawbacks</p><p>Reduce barrel life</p><p>Significantly increase costs long term</p><p></p><p>Lead FF rounds</p><p>Practice</p><p>Easy</p><p>Have suitable powders</p><p></p><p>Drawback</p><p>May not get full form on 1 session due to lower pressure?</p><p>May lead up barrel even with coated lead bullets</p><p>Costs</p><p></p><p></p><p>Thoughts? Especially would appreciate advice or experience with the faster powders I have.</p></blockquote><p></p>
[QUOTE="Tac-O, post: 2363205, member: 109994"] I know this topic has been covered many times on this forum, but I wanted to go over it a bit here to look at my options, taking into account costs, powders I have on hand, and benefits/drawnacks of different methods. I'm doing an AI 30-284. The virgin brass should headspace off the neck/shoulder junction with a 0.004 crush fit per Ackley's method. 284 already has a 35* shoulder and I'm going to 40* and blowing the shoulder walk out by a total of 0.010. so, there won't be a huge difference from straight 284... About 2.5-3gr. Powders I have on hand Trail boss Aa5744 IMr 4227 Imr 4451 H4350 Bullets, I plan to shoot 175-200gr in the end, but local shops have 110-150gr bullets available pretty cheaply. COW It seems this would be the cheapest easy option and if using the lubing technique [USER=4191]@phorwath[/USER] mentioned in his FF thread, I should be able to get a full forming from 1 session and low pressure loads. With the crush fit, I may not have to lube to get a full form on 1 session. Drawbacks Don't get shooting practice Messy May not get consistent results for brass OAL change based on [USER=101859]@Alex Wheeler[/USER] post on accurate shooter forum. Supposedly there can be some type of danger from caking or something inside the chamber or something? Not sure on this one. I don't know if TB, 4227, or 5744 would be appropriate for COW. Hydro die Cheaper in the long run Don't have to go to the range or elsewhere to FF No wear on barrel Drawbacks I only use a Lee hand press for loading. Not sure if I could built a platform or something with my bench vise to mount the die. Wouldn't be an exact match to chamber unless I send them my reamer or FF brass? Have them build it with lengthened shoulder dimension and then run it through my FL die? Full pressure FF Easy and get practice With small change in case capacity, velocity might not be that far off so I could still have fun/hunt with them Likely a full forming in 1 session? Drawbacks Reduce barrel life Significantly increase costs long term Lead FF rounds Practice Easy Have suitable powders Drawback May not get full form on 1 session due to lower pressure? May lead up barrel even with coated lead bullets Costs Thoughts? Especially would appreciate advice or experience with the faster powders I have. [/QUOTE]
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