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Rifles, Reloading, Optics, Equipment
Reloading
Powder Test 7mm Rem Mag
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<blockquote data-quote="baldhunter" data-source="post: 2870750" data-attributes="member: 11853"><p>The difference in velocity between the three 4350 powders has a lot to do with the cartridge case capacity fill and the bullet weight.The three powders are different in weight volume per grain of powder.The A4350 is the lightest and takes up more case space,followed by IMR4350.It falls about right inbetween A4350 and the heaviest H4350.Here are some examples of what I have loading all three the same.</p><p>308 Norma Magnum 168gr Nosler Ballistic Tip</p><p>H4350 69.0grs 3148fps</p><p>IMR4350 69.0grs 3111fps</p><p>A4350 69.0grs 3125fps (70.0grs 3168fps)</p><p></p><p>308 Norma Magnum 180gr Nosler Ballistic Tip</p><p>H4350 69.0grs 3028fps</p><p>IMR4350 69.0grs 3103fps</p><p>A4350 69.0grs 3065fps</p><p>I ran this test years ago in my 30-06 A4350 was the fastest,followed by IMR4350,about 10fps slower,followed by H4350 being the slowest by about 25fps slower than the fastest.All the powders grouped about the same.</p></blockquote><p></p>
[QUOTE="baldhunter, post: 2870750, member: 11853"] The difference in velocity between the three 4350 powders has a lot to do with the cartridge case capacity fill and the bullet weight.The three powders are different in weight volume per grain of powder.The A4350 is the lightest and takes up more case space,followed by IMR4350.It falls about right inbetween A4350 and the heaviest H4350.Here are some examples of what I have loading all three the same. 308 Norma Magnum 168gr Nosler Ballistic Tip H4350 69.0grs 3148fps IMR4350 69.0grs 3111fps A4350 69.0grs 3125fps (70.0grs 3168fps) 308 Norma Magnum 180gr Nosler Ballistic Tip H4350 69.0grs 3028fps IMR4350 69.0grs 3103fps A4350 69.0grs 3065fps I ran this test years ago in my 30-06 A4350 was the fastest,followed by IMR4350,about 10fps slower,followed by H4350 being the slowest by about 25fps slower than the fastest.All the powders grouped about the same. [/QUOTE]
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Powder Test 7mm Rem Mag
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