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Okay I have been reloading for about 20 years now and one of the most valuable tools I have ever purchased was a cronograph. Pressure is what blows up your gun. As velocity increase's so does pressure. Loading manuals give a max velocity as well as a max powder charge. Some guns reach that max velocity max pressure point at somewhat lower powder charge's than what's listed. You need some way to measure this accuratly. I can't count how many time's I have been at the range clocking loads and been approached by some guy wanting to know the velocity of his "pet load". You'd be suprised at how many time's that load clocked over max for that powder/bullet combo. 9 out of 10 time's there were no visable signs of exccesive pressure. But it was there. Be safe get a cronograph. Know for sure your not on the ragged edge.

[QUOTE="RO Rick, post: 601811, member: 6562"] Okay I have been reloading for about 20 years now and one of the most valuable tools I have ever purchased was a cronograph. Pressure is what blows up your gun. As velocity increase's so does pressure. Loading manuals give a max velocity as well as a max powder charge. Some guns reach that max velocity max pressure point at somewhat lower powder charge's than what's listed. You need some way to measure this accuratly. I can't count how many time's I have been at the range clocking loads and been approached by some guy wanting to know the velocity of his "pet load". You'd be suprised at how many time's that load clocked over max for that powder/bullet combo. 9 out of 10 time's there were no visable signs of exccesive pressure. But it was there. Be safe get a cronograph. Know for sure your not on the ragged edge. [/QUOTE]

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