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Rifles, Reloading, Optics, Equipment
Reloading
help sizing .30-378wby brass
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<blockquote data-quote="J E Custom" data-source="post: 164979" data-attributes="member: 2736"><p><strong>30/378</strong></p><p></p><p>Sounds like a lot of good advice.</p><p></p><p>The trick to Weatherby or any belted magnum case is that the</p><p>head space needs to be .001 or less and the chamber needs</p><p>to be concentric. Then size as close to full length as possible</p><p>with out touching the sholder of the case.</p><p></p><p>By doing this everthing is aligned prefect an the problems with </p><p>freebore are eliminated .</p><p></p><p>If the head space is more than .001 or .002 thousandths thenI would</p><p>recomend neck sizing only."BUT" before you go hunting try each round</p><p>to make sure they will go ( A common practice with dangerous game</p><p>rifles even with full length sizing to avoid a problem at the worst time).</p><p></p><p>So start by checking the head space on your rifle and go from there.</p><p></p><p>All you need to check head space is a small peice of brass shim stock</p><p>.002 and some grease to make it stick to the bolt face . Cut several</p><p>pieces small enough to fit in the bolt face without touching the extractor</p><p></p><p>Being very careful use a new factory round and close the bolt on it</p><p>with one of the brass shims stuck to the bolt face if you feel a slight</p><p>resistance then take the shim out and try it with out the shim. If it </p><p>feels the same add two of the shims( You should'nt be able to close </p><p>the bolt with out forcing it"DON'T" .</p><p></p><p>Of course if you have access to a head space gauge please use it first</p><p>to avoid using a live round.</p><p></p><p>One of my Weatherby's shoots a .091 5 shot group set up this way.</p><p></p><p>Good luck</p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 164979, member: 2736"] [b]30/378[/b] Sounds like a lot of good advice. The trick to Weatherby or any belted magnum case is that the head space needs to be .001 or less and the chamber needs to be concentric. Then size as close to full length as possible with out touching the sholder of the case. By doing this everthing is aligned prefect an the problems with freebore are eliminated . If the head space is more than .001 or .002 thousandths thenI would recomend neck sizing only."BUT" before you go hunting try each round to make sure they will go ( A common practice with dangerous game rifles even with full length sizing to avoid a problem at the worst time). So start by checking the head space on your rifle and go from there. All you need to check head space is a small peice of brass shim stock .002 and some grease to make it stick to the bolt face . Cut several pieces small enough to fit in the bolt face without touching the extractor Being very careful use a new factory round and close the bolt on it with one of the brass shims stuck to the bolt face if you feel a slight resistance then take the shim out and try it with out the shim. If it feels the same add two of the shims( You should'nt be able to close the bolt with out forcing it"DON'T" . Of course if you have access to a head space gauge please use it first to avoid using a live round. One of my Weatherby's shoots a .091 5 shot group set up this way. Good luck J E CUSTOM [/QUOTE]
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help sizing .30-378wby brass
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