Posts by Big Bore
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DOK;
When it comes to velocities, nothing is a given. The first load I worked up in my FA was with the 355 gr. bullet and I got my best load at 31.5 gr. H110 for 1691.3 fps. Later, I thought that I would try to shoot a 310 gr. bullet just a little faster so I could flatten out the trajectory a bit. Since all was well up to the listed max of 32.0 gr. for the 355 gr. bullet (for 1730.3 fps), I figured that if I loaded up the 310 gr. to 32.0 gr I should be really tripping the light fantastic. Same charge, lighter bullet, faster load, right? Completely different results occured. The 310 gr. bullet with the 32.0 gr. load only gave 1613 fps, and the load burned so dirty I could only fire 10 shots before cleaning. The same load with the 355 gr. bullet burned clean enough that I did not need to clean things up until about 50 shots had been fired, and believe me, 50 shots are a lot of shots with this load. According to the load data that I got for this load from John Taffin, my listed load out of a 7.5 in barrel should be about 75 fps slower than out of a 10" bbl. This is not a "guessed" decrease, but a decrease actually measured by Taffin in different guns with different barrel lengths, all FA revolvers. Out of Taffins 10" FA revolver, he got 1800 fps, over a 100 fps more than I did out of mine with the same barrel length. However, he was shooting a 340 gr. bullet, not a 355 gr. bullet.
Just shows to go ya, you never know what you are going to get until you test it for yourself.
When it comes to velocities, nothing is a given. The first load I worked up in my FA was with the 355 gr. bullet and I got my best load at 31.5 gr. H110 for 1691.3 fps. Later, I thought that I would try to shoot a 310 gr. bullet just a little faster so I could flatten out the trajectory a bit. Since all was well up to the listed max of 32.0 gr. for the 355 gr. bullet (for 1730.3 fps), I figured that if I loaded up the 310 gr. to 32.0 gr I should be really tripping the light fantastic. Same charge, lighter bullet, faster load, right? Completely different results occured. The 310 gr. bullet with the 32.0 gr. load only gave 1613 fps, and the load burned so dirty I could only fire 10 shots before cleaning. The same load with the 355 gr. bullet burned clean enough that I did not need to clean things up until about 50 shots had been fired, and believe me, 50 shots are a lot of shots with this load. According to the load data that I got for this load from John Taffin, my listed load out of a 7.5 in barrel should be about 75 fps slower than out of a 10" bbl. This is not a "guessed" decrease, but a decrease actually measured by Taffin in different guns with different barrel lengths, all FA revolvers. Out of Taffins 10" FA revolver, he got 1800 fps, over a 100 fps more than I did out of mine with the same barrel length. However, he was shooting a 340 gr. bullet, not a 355 gr. bullet.
Just shows to go ya, you never know what you are going to get until you test it for yourself.
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