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Rifles, Reloading, Optics, Equipment
Reloading
Overpressure Signs ?
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<blockquote data-quote="Kennibear" data-source="post: 952188" data-attributes="member: 51650"><p>Clark</p><p>Read P.O. Ackley's V I & V II at least twenty times. A must read for every shooter. V. Speer's comment on Norma brass was decades age and does not apply today. The sections on barrel steels and case shape/capacity are eye opening. 100+ recommended read.</p><p>Lefty</p><p> The new setup from RSI includes a gel superglue that works fine. Major key to a successful strain gauge install is a surgically clean surface and <strong><em>LOTS</em></strong> of pressure for 24 hours. I use a SS hose clamp over plastic shim stock but cut up old squeeze bottles works too. Tried LockTite HyPo E-120 epoxy w/ cure @ 150F and post cure @ 250F but the epoxy shrank so much the gauge was off by 40Kpsi.</p><p>I also paint the gauge and leads over with varnish (not lacquer) as it keeps atmospherics from attacking the cyanoacrylic bond.</p><p> The cleaning for me is; nitromethane, citrus stripper wash, laquer thinner series. Not to offend the RSI folks (they are great!) but I buy my strain gauges from the maker 8 at a whack. I could do an article about strain gauge installs for LRH if Len wants and enough members would be interested.</p><p></p><p> The biggest warning I have for members is watch closely for sign of high pressure as they are subtle and pressure spikes fast!</p><p></p><p>KB</p></blockquote><p></p>
[QUOTE="Kennibear, post: 952188, member: 51650"] Clark Read P.O. Ackley's V I & V II at least twenty times. A must read for every shooter. V. Speer's comment on Norma brass was decades age and does not apply today. The sections on barrel steels and case shape/capacity are eye opening. 100+ recommended read. Lefty The new setup from RSI includes a gel superglue that works fine. Major key to a successful strain gauge install is a surgically clean surface and [B][I]LOTS[/I][/B] of pressure for 24 hours. I use a SS hose clamp over plastic shim stock but cut up old squeeze bottles works too. Tried LockTite HyPo E-120 epoxy w/ cure @ 150F and post cure @ 250F but the epoxy shrank so much the gauge was off by 40Kpsi. I also paint the gauge and leads over with varnish (not lacquer) as it keeps atmospherics from attacking the cyanoacrylic bond. The cleaning for me is; nitromethane, citrus stripper wash, laquer thinner series. Not to offend the RSI folks (they are great!) but I buy my strain gauges from the maker 8 at a whack. I could do an article about strain gauge installs for LRH if Len wants and enough members would be interested. The biggest warning I have for members is watch closely for sign of high pressure as they are subtle and pressure spikes fast! KB [/QUOTE]
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Overpressure Signs ?
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