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Hunting
Long Range Hunting & Shooting
338 Allen Xpress, RL33 load development
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<blockquote data-quote="NZ Longranger" data-source="post: 1044254" data-attributes="member: 14"><p>Swamp,</p><p>We've been building and shooting the 7mm Fatmax since the 338 Norma case came out, about 5 or 6 years now from memory. Swapped to the 300 Norma brass as soon as that was available. Currently, we use US869, and the powder charge depends entirely on the lot#. With the 180gn Hybrid, we can use up to 100gns with the older slowest burning batches, down to 96gns with the later faster burning batches. Out of a 26" barrel, expect about 3225 to 3275 fps, depending on how hard you want to drive them.</p><p></p><p>With Retumbo, around 90gns is about right, and 3200fps.</p><p></p><p>Longer barrel you'll obviously get more fps, but we build these mainly in our lightest weight mountain rifles, under 7lbs all up including scope.</p><p></p><p>Sing out if you want more info.</p><p>Greg</p></blockquote><p></p>
[QUOTE="NZ Longranger, post: 1044254, member: 14"] Swamp, We've been building and shooting the 7mm Fatmax since the 338 Norma case came out, about 5 or 6 years now from memory. Swapped to the 300 Norma brass as soon as that was available. Currently, we use US869, and the powder charge depends entirely on the lot#. With the 180gn Hybrid, we can use up to 100gns with the older slowest burning batches, down to 96gns with the later faster burning batches. Out of a 26" barrel, expect about 3225 to 3275 fps, depending on how hard you want to drive them. With Retumbo, around 90gns is about right, and 3200fps. Longer barrel you'll obviously get more fps, but we build these mainly in our lightest weight mountain rifles, under 7lbs all up including scope. Sing out if you want more info. Greg [/QUOTE]
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338 Allen Xpress, RL33 load development
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