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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
PSA 300 BLK upper, any good?
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<blockquote data-quote="QuietTexan" data-source="post: 2418931" data-attributes="member: 116181"><p>You can use small base dies continually, or never use them at all. Depending on the chamber in the barrel it may or may not actually be necessary. I think I have a 223 Rem SB set, but I've never needed one for 300 BLK. I was saying don't use the CB die first because if you cut a case, don't deburr, then jam a piece of brass up in the die you can wreck the die, so don't wreck a more expensive RCBS die when you could sacrifice a cheaper Lee. Then use the SB die on the cut, cleaned up, deburred brass for a final initial sizing.</p><p></p><p>But that was the old way - honestly I hadn't ever really considered NOT cutting the case first. Then I found that little jig. Resizing first is what I meant by putting the new shoulder on before cutting - resize the 223 case in the 300 BLK die, have two shoulders and the case grows a touch, then cut. I'd never considered not cutting first because I aligned the cut based on the 223 Rem shoulder location, but that little jig makes it look much easier to cut a resized case more accurately than I could with an angle grinder and a vice (it was tough times in the way back <img class="smilie smilie--emoji" loading="lazy" alt="😂" title="Face with tears of joy :joy:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f602.png" data-shortname=":joy:" /> ). So resizing first then cutting is probably the better process, yes, especially if you have that little jig and a chop saw or a band saw to make a much cleaner and better cut.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2418931, member: 116181"] You can use small base dies continually, or never use them at all. Depending on the chamber in the barrel it may or may not actually be necessary. I think I have a 223 Rem SB set, but I've never needed one for 300 BLK. I was saying don't use the CB die first because if you cut a case, don't deburr, then jam a piece of brass up in the die you can wreck the die, so don't wreck a more expensive RCBS die when you could sacrifice a cheaper Lee. Then use the SB die on the cut, cleaned up, deburred brass for a final initial sizing. But that was the old way - honestly I hadn't ever really considered NOT cutting the case first. Then I found that little jig. Resizing first is what I meant by putting the new shoulder on before cutting - resize the 223 case in the 300 BLK die, have two shoulders and the case grows a touch, then cut. I'd never considered not cutting first because I aligned the cut based on the 223 Rem shoulder location, but that little jig makes it look much easier to cut a resized case more accurately than I could with an angle grinder and a vice (it was tough times in the way back 😂 ). So resizing first then cutting is probably the better process, yes, especially if you have that little jig and a chop saw or a band saw to make a much cleaner and better cut. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
PSA 300 BLK upper, any good?
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