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Rifles, Reloading, Optics, Equipment
Reloading
"difficult" calibers
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<blockquote data-quote="Garou_22" data-source="post: 1576933" data-attributes="member: 108900"><p>Hard to load: any a substantial neck diameter changing and/or shoulder geometry variances. </p><p></p><p>Elk to 500 or better.... will 1400 yards do? Easy wildcat is necking a .300 Win Mag to .284, no shoulder changes. It's called a 7mm Practical. Mine is built of a Defiance Rebel Action with 20MOA picitiny ($1200.00 at time of build - 2012), 30 inch Lilja .284 3 groove barrel, Cooper break, AICS folding stock, and Jewel trigger Guard under safety set to 1Lbs. The chamber is bored for Berger 180gr VLD bullets. My load is 76gr H4831SC, Berger 180gr seated at .150, Norma Brass, and a CCI 250 Magnum primer. It's a little hot, but gets me an average 3050fps muzzle velocity with a Standard Deviation of 12.</p><p>Compared to my straight .300 Win Mag on a stock Stainless New Haven Model 70 26" shooting a 180gr Sierra GameKing pushed by 74.4gr of IMR 7828SSC, Winchester Brass, and the same CCI 250 Mag primer at an average 3050fps Muzzle, the differences are thus: </p><p>.308 = 32MOA drop at 1000yds of a 200yd zero</p><p>.284 = 22MOA drop @ 1000 & 200 zero</p><p>.308 = 1400ftlb threshold at 800yds</p><p>.284 = 1400ftlb threshold at 1400yds</p><p></p><p>Measurements made over an Öhler 35 3pane proof screen chrono and Kestral 4500 Ammometer on the same day within 10 minutes one platform to the next. Each were 5 shot strings.</p></blockquote><p></p>
[QUOTE="Garou_22, post: 1576933, member: 108900"] Hard to load: any a substantial neck diameter changing and/or shoulder geometry variances. Elk to 500 or better.... will 1400 yards do? Easy wildcat is necking a .300 Win Mag to .284, no shoulder changes. It's called a 7mm Practical. Mine is built of a Defiance Rebel Action with 20MOA picitiny ($1200.00 at time of build - 2012), 30 inch Lilja .284 3 groove barrel, Cooper break, AICS folding stock, and Jewel trigger Guard under safety set to 1Lbs. The chamber is bored for Berger 180gr VLD bullets. My load is 76gr H4831SC, Berger 180gr seated at .150, Norma Brass, and a CCI 250 Magnum primer. It's a little hot, but gets me an average 3050fps muzzle velocity with a Standard Deviation of 12. Compared to my straight .300 Win Mag on a stock Stainless New Haven Model 70 26" shooting a 180gr Sierra GameKing pushed by 74.4gr of IMR 7828SSC, Winchester Brass, and the same CCI 250 Mag primer at an average 3050fps Muzzle, the differences are thus: .308 = 32MOA drop at 1000yds of a 200yd zero .284 = 22MOA drop @ 1000 & 200 zero .308 = 1400ftlb threshold at 800yds .284 = 1400ftlb threshold at 1400yds Measurements made over an Öhler 35 3pane proof screen chrono and Kestral 4500 Ammometer on the same day within 10 minutes one platform to the next. Each were 5 shot strings. [/QUOTE]
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Reloading
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