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Long Range Hunting & Shooting
Bertram brass sticking in shell holder?
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<blockquote data-quote="7mmRHB" data-source="post: 859830" data-attributes="member: 3584"><p>Kirby, the neck thickness variation was not good but was no worse than Rem. Win. or Fed. It was obviously much worse than the average Lapua or Norma necks, but I have had batches of 6.5 - 284 Lapua cases that were every bit as bad as the Bertram cases.</p><p></p><p>One thing I failed to mention was the head space or base to datum line dimension . A 338 Edge go gauge measures 2.467 (with my Stoney point comparator) and the Bertram Brass varied from 2.467 to 2.458 with most falling into the 2.463-2.464 range. ( about 60%). There were allot of the short ones (30%) that are going to be stretched, during firing, more than you would like to see. Nine Thou. is a quite a bit of case volume variation to deal with for initial load development, so I would sort out the short ones and use them for the break-in rounds. ---- RHB</p></blockquote><p></p>
[QUOTE="7mmRHB, post: 859830, member: 3584"] Kirby, the neck thickness variation was not good but was no worse than Rem. Win. or Fed. It was obviously much worse than the average Lapua or Norma necks, but I have had batches of 6.5 - 284 Lapua cases that were every bit as bad as the Bertram cases. One thing I failed to mention was the head space or base to datum line dimension . A 338 Edge go gauge measures 2.467 (with my Stoney point comparator) and the Bertram Brass varied from 2.467 to 2.458 with most falling into the 2.463-2.464 range. ( about 60%). There were allot of the short ones (30%) that are going to be stretched, during firing, more than you would like to see. Nine Thou. is a quite a bit of case volume variation to deal with for initial load development, so I would sort out the short ones and use them for the break-in rounds. ---- RHB [/QUOTE]
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Bertram brass sticking in shell holder?
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