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Rifles, Reloading, Optics, Equipment
7mm STW
Peterson Brass Belted Mag Basic Unprimed Box of 50
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<blockquote data-quote="Mike Matteson" data-source="post: 2905431" data-attributes="member: 101791"><p>You have gotten a lot of firing from those cases. That great. I don't how much you are bumping the shoulder back on those cases. I found a long time ago with my 308 NM that just using a neck sizing die stop the case separation at the base. I resizing 300WM brass into the 308 NM brass. Fire-form them. I would lose the brass in 3 firing or so doing FL sizing. Change to using a 300WM neck sizing die. My problem with case separation stop in there tracks. Note: that 308NM is shorter to the shoulder than the 300WM. So I figure could use it after fire-forming the brass. It fit my chamber after that. The 300WM neck sizing die only sizes about 3/4 of the neck for the 308NM. I was working on grouping use a neck sizing die. Couldn't get a 308NM neck sizing die.So I changed it to 300WM neck sizing die. By accident I stumable on to having case separation. I run my 308 hot powder loads. So I would lose then in about 10 to 12 firing do to primer pockets. I have 3 338WM rifles. I am going to use those staight wall case to size them to 338WM cases. I like your imput on using 375Wby dies. </p><p>Now if I could convert something like Peterson brass into 220 Swift. I would have it made. <img class="smilie smilie--emoji" loading="lazy" alt="😁" title="Beaming face with smiling eyes :grin:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f601.png" data-shortname=":grin:" /></p></blockquote><p></p>
[QUOTE="Mike Matteson, post: 2905431, member: 101791"] You have gotten a lot of firing from those cases. That great. I don't how much you are bumping the shoulder back on those cases. I found a long time ago with my 308 NM that just using a neck sizing die stop the case separation at the base. I resizing 300WM brass into the 308 NM brass. Fire-form them. I would lose the brass in 3 firing or so doing FL sizing. Change to using a 300WM neck sizing die. My problem with case separation stop in there tracks. Note: that 308NM is shorter to the shoulder than the 300WM. So I figure could use it after fire-forming the brass. It fit my chamber after that. The 300WM neck sizing die only sizes about 3/4 of the neck for the 308NM. I was working on grouping use a neck sizing die. Couldn't get a 308NM neck sizing die.So I changed it to 300WM neck sizing die. By accident I stumable on to having case separation. I run my 308 hot powder loads. So I would lose then in about 10 to 12 firing do to primer pockets. I have 3 338WM rifles. I am going to use those staight wall case to size them to 338WM cases. I like your imput on using 375Wby dies. Now if I could convert something like Peterson brass into 220 Swift. I would have it made. 😁 [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
Peterson Brass Belted Mag Basic Unprimed Box of 50
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