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Rifles, Reloading, Optics, Equipment
Reloading
Even Factory ammo can be over pressure!
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<blockquote data-quote="comen" data-source="post: 2120549" data-attributes="member: 52622"><p>Sorry for a long post, but:</p><p>I reload for my brother's custom 338 win. This rifle is built on a model 1917, and has been rebored from the original 30-06 to .338, chambered to 338 win mag and cut rifled in 8 groove. The bolt face is appropriately opened and feed rails modified. This gun was purchased at a local pawn shop so we don't know who did the work. In the process of load development I chronographed Federal 225 gr fusion factory loads. I averaged 2996 for five shots, (including 1 at 3016) and 4 of the five showed primer cratering. Rather than decide that these were really awesome factory load speeds, I came to the conclusion that in this rifle, they were way over pressure. The handload I eventually developed shoots a 225 gr A-Frame at 2750 fps with 64.7 grains of 4955. My thought is just because it's a factory load does not mean that the load is safe in your rifle. Has anyone else experienced unusually high velocities and pressure signs in factory loads, especially in custom barrels?</p></blockquote><p></p>
[QUOTE="comen, post: 2120549, member: 52622"] Sorry for a long post, but: I reload for my brother's custom 338 win. This rifle is built on a model 1917, and has been rebored from the original 30-06 to .338, chambered to 338 win mag and cut rifled in 8 groove. The bolt face is appropriately opened and feed rails modified. This gun was purchased at a local pawn shop so we don't know who did the work. In the process of load development I chronographed Federal 225 gr fusion factory loads. I averaged 2996 for five shots, (including 1 at 3016) and 4 of the five showed primer cratering. Rather than decide that these were really awesome factory load speeds, I came to the conclusion that in this rifle, they were way over pressure. The handload I eventually developed shoots a 225 gr A-Frame at 2750 fps with 64.7 grains of 4955. My thought is just because it's a factory load does not mean that the load is safe in your rifle. Has anyone else experienced unusually high velocities and pressure signs in factory loads, especially in custom barrels? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Even Factory ammo can be over pressure!
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