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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 Norma Mag AI Shorty Build
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<blockquote data-quote="7.62 Gunner" data-source="post: 2744169" data-attributes="member: 121641"><p>Thought I'd start a build thread for my 300 NM 40 degree Ackley improved.</p><p>My objective is to send 225 ELDMs at 2800 fps from a 19" barrel in a sub 10lb suppressed hunting setup.</p><p></p><p>I went with a BAT Vesper action, Unknown Munitions bottom metal, Bix n Andy trigger, and a #4 contour 19" 9 twist McGowen prefit (Gasp), with a 1.250" shank.</p><p> Still waiting on my Manners LRH.</p><p></p><p>I had Manson design a custom 40 degree Ackley reamer based on Lapua brass with a .004 crush fit. I added .005 clearance .200 above the web to avoid the "Clicker" issue. </p><p>It's throated for the 225 ELDM seated just above the neck shoulder junction.</p><p></p><p>I got the barrel torqued on and set it in a cheap factory plastic stock for fire forming. </p><p>It weighs 7.4 lbs with bottom metal and Nomad LT suppressor, with the March FX 4.5-28×52 and LRH stock it'll be just under 10 lbs.</p><p></p><p>I fire formed a few cases and dialed her in at 100 yards, I was shocked to see my fire forming loads just stacking in tight.</p><p>I needed to fire three cases three times to send in for custom dies, so I worked up to 79 grains with 225 eldms while dialing in the scope.</p><p>I went for a group on the third firing and without any cherry picking shot a 3/8" group.</p><p>More to come.</p><p>[ATTACH]438404[/ATTACH][ATTACH]438406[/ATTACH][ATTACH]438407[/ATTACH][ATTACH]438408[/ATTACH]</p></blockquote><p></p>
[QUOTE="7.62 Gunner, post: 2744169, member: 121641"] Thought I'd start a build thread for my 300 NM 40 degree Ackley improved. My objective is to send 225 ELDMs at 2800 fps from a 19" barrel in a sub 10lb suppressed hunting setup. I went with a BAT Vesper action, Unknown Munitions bottom metal, Bix n Andy trigger, and a #4 contour 19" 9 twist McGowen prefit (Gasp), with a 1.250" shank. Still waiting on my Manners LRH. I had Manson design a custom 40 degree Ackley reamer based on Lapua brass with a .004 crush fit. I added .005 clearance .200 above the web to avoid the "Clicker" issue. It's throated for the 225 ELDM seated just above the neck shoulder junction. I got the barrel torqued on and set it in a cheap factory plastic stock for fire forming. It weighs 7.4 lbs with bottom metal and Nomad LT suppressor, with the March FX 4.5-28×52 and LRH stock it'll be just under 10 lbs. I fire formed a few cases and dialed her in at 100 yards, I was shocked to see my fire forming loads just stacking in tight. I needed to fire three cases three times to send in for custom dies, so I worked up to 79 grains with 225 eldms while dialing in the scope. I went for a group on the third firing and without any cherry picking shot a 3/8" group. More to come. [ATTACH]438404[/ATTACH][ATTACH]438406[/ATTACH][ATTACH]438407[/ATTACH][ATTACH]438408[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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300 Norma Mag AI Shorty Build
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