Tomboy Posted March 10, 2011 Share Posted March 10, 2011 Howdy, Okay, I have forgotten: bullet is hitting high and the rear sight is cranked all the way down. What is the remedy reloadingwise? Thanks, T. Link to comment Share on other sites More sharing options...
Gateway Kid SASS# 70038 Life Posted March 10, 2011 Share Posted March 10, 2011 lighter bullet or taller front sight Regards Gateway Kid Link to comment Share on other sites More sharing options...
William Waddy Posted March 10, 2011 Share Posted March 10, 2011 more powder = lower impact (at least at close range) Link to comment Share on other sites More sharing options...
Tomboy Posted March 10, 2011 Author Share Posted March 10, 2011 more powder = lower impact (at least at close range) William, Wouldn't a heavier charge increase recoil thus raising the impact point? Not arguing, just asking. Thanks, T. Link to comment Share on other sites More sharing options...
Cypress Sam, SASS #10915 Posted March 10, 2011 Share Posted March 10, 2011 Nope, bullet gets out of the barrel faster, before barrel rise can affect the aim. Link to comment Share on other sites More sharing options...
Tomboy Posted March 10, 2011 Author Share Posted March 10, 2011 Nope, bullet gets out of the barrel faster, before barrel rise can affect the aim. Thanks, Cy, what if I increased charge and went w. lighter bullet? -T Link to comment Share on other sites More sharing options...
Cypress Sam, SASS #10915 Posted March 10, 2011 Share Posted March 10, 2011 That should lower the point of impact. It'll be inches though, not feet. Link to comment Share on other sites More sharing options...
Tomboy Posted March 10, 2011 Author Share Posted March 10, 2011 That should lower the point of impact. It'll be inches though, not feet. Inches? Good enough. -T Link to comment Share on other sites More sharing options...
Jack Houston # 35508 Posted March 10, 2011 Share Posted March 10, 2011 Get close to the target :lol: Link to comment Share on other sites More sharing options...
THE CALHOUN COUNTY BA Posted March 12, 2011 Share Posted March 12, 2011 Howdy, Okay, I have forgotten: bullet is hitting high and the rear sight is cranked all the way down. What is the remedy reloadingwise? Thanks, T. Try different powder, there r many that will work . I try until I find one that will hit the bulls eye and hit where I want. CCBA Link to comment Share on other sites More sharing options...
Driftwood Johnson, SASS #38283 Posted March 12, 2011 Share Posted March 12, 2011 Nope, bullet gets out of the barrel faster, before barrel rise can affect the aim. Howdy With all due respect, I believe this is a commonly held misconception. At least my own tests seem to prove the opposite. In my experience, when the bullet is kept the same, but the powder charge is increased, the point of impact is raised, not lowered. Several years ago I was trying out some different 38 Special loads for accuracy. Same 158 grain bullet, different powder charges. When fired from a rest the loads with the heavier powder charges consistently printed higher than the loads with lighter charges, point of aim being the same in both cases. This was at fairly close range, about 30 feet. Just the other day I was trying to lower the point of impact on another pistol. Same results. Same bullet, lower powder charge and the point of impact came down a couple of inches. In my experience, the slightly shorter amount of time the bullet is in the barrel is offset by the greater amount of muzzle rise with the heavier powder charge. Link to comment Share on other sites More sharing options...
ShadowCatcher Posted March 12, 2011 Share Posted March 12, 2011 Howdy, Okay, I have forgotten: bullet is hitting high and the rear sight is cranked all the way down. What is the remedy reloadingwise? Thanks, T. The specific answer to your question is to go to a lighter bullet (if you want the reloading answer). The heavier the bullet the higher the point of impact, for a general velocity. The gun responds to the powder burning at the same time the bullet responds, it's equal and opposite, and the bullet can't out speed the recoil, so playing with different powders will make a lot less difference than changing bullet weights. Dwell time in the barrel is not really a major determinant; it's the force, which is a product of the mass and the acceleration. A lot of folks are playing with the 147 for 9mm, vice the traditional 115 or 124 gr loadings, my experience in the Browning and the Kahr is that this only changed the POI by an inch or so, for the 115 vs 124 loadings the POI differed by less than the group sizes. Some like loading the 90 or 88 grain bullets at mach frantic for more expansion. Can we get some specific numbers. Where does it hit with a 115 or 124, and with what group size, at what distance? Where does it hit with other bullet weights and at what distances. How far from the point of aim is that impact? Shadow Catcher Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.