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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to blowup your rifle
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<blockquote data-quote="bigngreen" data-source="post: 1386291" data-attributes="member: 13632"><p>I think we can take the brass of the suspect list, measuring a sister case to the high pressure case and a new case I had they are in spec.</p><p>This weekend I'll run a test to measure accurately the amount of barrel constriction due to temp that is actually realized, I can measure the bore to .0002 and the OD to .00005, should yield some interesting data.</p><p>The high pressure case has some normal sooting around the neck which is a normal indicator the load was not super high pressure in the initial start of the bullet. </p><p>Looking at the load data for Retumbo on the Hodgdon web site and using a 220 Partition which should have more bearing surface than a VLD they are showing an 89 gr max load being 61,900 psi, there was a 5300 psi gain in 5 grains of powder. This really seems to make it hard to get this significant of pressure from a powder charge or mistakingly loading the lighter bullets charge. </p><p>One powder on the bench rules out a faster powder.</p></blockquote><p></p>
[QUOTE="bigngreen, post: 1386291, member: 13632"] I think we can take the brass of the suspect list, measuring a sister case to the high pressure case and a new case I had they are in spec. This weekend I'll run a test to measure accurately the amount of barrel constriction due to temp that is actually realized, I can measure the bore to .0002 and the OD to .00005, should yield some interesting data. The high pressure case has some normal sooting around the neck which is a normal indicator the load was not super high pressure in the initial start of the bullet. Looking at the load data for Retumbo on the Hodgdon web site and using a 220 Partition which should have more bearing surface than a VLD they are showing an 89 gr max load being 61,900 psi, there was a 5300 psi gain in 5 grains of powder. This really seems to make it hard to get this significant of pressure from a powder charge or mistakingly loading the lighter bullets charge. One powder on the bench rules out a faster powder. [/QUOTE]
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How to blowup your rifle
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