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Old 09-06-2013, 19:18   #2
F106 Fan
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The hobby reloader has NO way to measure or estimate pressure. There are some signs of overpressure but by the time they show up, you are probably about 20% over.

Read, starting on page 59 of Speer #14, about the voodoo of reading overpressure signs. If they can't do it, there isn't much hope for the rest of us!

You can look for signs of difficult extraction, bulged cases, flattened primers but these occur when vastly overpessure. Except flattened primers. Federal primers will flatten in a light wind.

So, take your reloading data seriously, decide on who you trust and go for it. Very few manuals publish pressure for their reloads. I might lend more credence to those who do. They might have actually measured something.

OTOH, why load anywhere near max? If you need more velocity, change powders. The most accurate loads will be at mid-range anyway. Take a look at the Sierra load for the .308 175 gr BTHP. Their accuracy load has a muzzle velocity of 2400 fps and I only get about 2300 fps out of my 20" barrel. But it's superbly accurate!

BTW, there is some instrumentation available to measure rifle pressures at significant extra additional expense.

"No matter how cynical you become, it's never enough to keep up." - Lily Tomlin

Last edited by F106 Fan; 09-06-2013 at 19:20..
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