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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
26 Nosler Wildcats - 28 Nosler (284)
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<blockquote data-quote="chuckhammer" data-source="post: 1098216" data-attributes="member: 25816"><p>Bruce,</p><p>My wildcat is an improved 7-300 Win Mag I call the 7mm Valkyrie. The body taper is reduced by about .009" at the shoulder and the shoulder angle is increased from 25 to 37 degrees. The goal is to neck size only and eliminate case growth and trimming. In a fired WW Super case this yields a measured capacity of 93 grains H20 to the case mouth. Norma brass will hold more but is fairly thin and soft by comparison, thus limiting max pressure.</p><p></p><p>My rifle is built on a Savage 110 with a 28" barrel, 1" diameter straight taper, 1/9 twist Criterion Match. Using 86-87 grains of Reloader 33 behind a Berger 180 Hybrid ignited by a Russian LRM primer in the above mentioned WW Super brass with a ~3.770" COL (2.950" base-to-ogive) I'm getting 3250-3300 fps. This is a max++ load as it leaves slight ejector marks on the case head and somewhat flattened/cratered primers. In all likelihood this load is running 68-70k psi max pressure. Primer pockets are still tight (enough) after 3 firings.</p><p></p><p>I've only fired 50 total rounds down this barrel using various powders and bullets so load development for accuracy is incomplete. However, the above load has given me right at 1 MOA at 100 yards for five consecutive shots. This is using my humble SWFA SS 16x50 fixed power scope and fired from the bench off of a Caldwell "7 Rest."</p><p></p><p>My above experiences are how I based my 88-89 grain RL33 suggestion for the 28 Nosler. I understand this case has something like 100 grains H2O capacity.</p></blockquote><p></p>
[QUOTE="chuckhammer, post: 1098216, member: 25816"] Bruce, My wildcat is an improved 7-300 Win Mag I call the 7mm Valkyrie. The body taper is reduced by about .009" at the shoulder and the shoulder angle is increased from 25 to 37 degrees. The goal is to neck size only and eliminate case growth and trimming. In a fired WW Super case this yields a measured capacity of 93 grains H20 to the case mouth. Norma brass will hold more but is fairly thin and soft by comparison, thus limiting max pressure. My rifle is built on a Savage 110 with a 28" barrel, 1" diameter straight taper, 1/9 twist Criterion Match. Using 86-87 grains of Reloader 33 behind a Berger 180 Hybrid ignited by a Russian LRM primer in the above mentioned WW Super brass with a ~3.770" COL (2.950" base-to-ogive) I'm getting 3250-3300 fps. This is a max++ load as it leaves slight ejector marks on the case head and somewhat flattened/cratered primers. In all likelihood this load is running 68-70k psi max pressure. Primer pockets are still tight (enough) after 3 firings. I've only fired 50 total rounds down this barrel using various powders and bullets so load development for accuracy is incomplete. However, the above load has given me right at 1 MOA at 100 yards for five consecutive shots. This is using my humble SWFA SS 16x50 fixed power scope and fired from the bench off of a Caldwell "7 Rest." My above experiences are how I based my 88-89 grain RL33 suggestion for the 28 Nosler. I understand this case has something like 100 grains H2O capacity. [/QUOTE]
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26 Nosler Wildcats - 28 Nosler (284)
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