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zeke · March 16, 2013, 06:29 PM

Pond-your listing velocities from a 4 inch barrel. Compare the velocities you're getting with what shows in a variety of manuals for same bullet weight/type/powder. Most manuals use a longer 7.5-8 inch barrel, and can be expected up to aprox 1400 fps. Getting 1280 fps would seem reasonable, especially when staying within the commonly used charge weights for N-110. Getting 1336 fps with a 240 grain jacketed bullet from 4 incher is getting up there.

You already split one case, although there can be a variety of reasons for it.

Notice how much your velocity jumped when going up the second step, when working up tp 21.0 grains with the 240 grain bullet? This can be an indication of increasing pressure, not neccessarily the pressure is getting too high.

Have you ever chronographed a 240 grain hunting load from this particualar pistol?

March 16, 2013, 06:29 PM	#48
zeke Senior Member Join Date: November 17, 1999 Location: NW Wi Posts: 1,671	Pond-your listing velocities from a 4 inch barrel. Compare the velocities you're getting with what shows in a variety of manuals for same bullet weight/type/powder. Most manuals use a longer 7.5-8 inch barrel, and can be expected up to aprox 1400 fps. Getting 1280 fps would seem reasonable, especially when staying within the commonly used charge weights for N-110. Getting 1336 fps with a 240 grain jacketed bullet from 4 incher is getting up there. You already split one case, although there can be a variety of reasons for it. Notice how much your velocity jumped when going up the second step, when working up tp 21.0 grains with the 240 grain bullet? This can be an indication of increasing pressure, not neccessarily the pressure is getting too high. Have you ever chronographed a 240 grain hunting load from this particualar pistol? Last edited by zeke; March 16, 2013 at 06:36 PM.