another possibility: many years ago i bought an indoor/outdoor digital thermometer from radio shack that had a sensor that i taped to my barrel just in front of the chamber. the temp was recorded every few min or so and i could watch it rise to whatever level i chose as the max for load testing. when that max was reached, i stopped shooting, waited until the temp came down to the desired temp, then resume shooting. ther are probably newer such devices that record temp instantly. the thing i bought cost very little and was of some use for load development,especially during the summer. [/quote] if i can see you, i can touch you. BANG!