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Posted: 5/17/2009 7:24:29 AM EDT
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so ive been shooting my 115gr plated 9mm reloads with no problems and they are very accurate. i recently picked up some 125 gr lead rn bullets and loaded 50 of them. i was suprised at how bad the accuracy was. i guess my main question is how much does expanding the case effect accuracy when using lead. i noticed that while seating the bullets a very small sliver of lead was being shaved off. could this be the cause of my accuracy problem? i know it can effect it but how much does it?
-125gr lead rn 9mm with 4.5 grains of bullseye. EDIT: putting these rounds through a sig p226 thanks |
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I suspect that you have made a number of mistakes.......
1)....shaving lead off bullets while seating. You need to expand the case mouth more than when using a jacketed bullet, adjust your setting. 2)....don't just replace a bullet (brand, style, weight) and use the same powder weight and expect the same results. You need to "work up" your load after a component change. 3)....lead bullets usually do not do very well past 1000 fps. 4)....some bullet designs (shapes, mfns, lube groove placement, etc...) do better than others. 5)....you never mentioned your firearm/barrel. Glock is one of the brands that does not recommend lead bullets with their products. HTH. Aloha, Mark |
| well i made up some more. i belled the cases more so no more shaving is happening. i also reduced the powder to 4.0 grs. my group got a little bit smaller but not much. im getting conflicting load data. seems that some say 3.8 is starting and some say 4.4 is. can anyone help me out. also these are speers bullets. |
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Quoted:
If you are shooting a euro barrel like a glock or high power they are not designed for lead. The lands are not as tall. Also, work up a load. .1 grains of powder at a time, ten rounds per increment. Go out and shoot off bags. BS The lands are plenty tall. The issue with the Sig, as well as with most 9mm's, is it has a huge throat. It will swallow .360" bullets. I suggest you get some Laser Cast 125gr FP designed for the 357 Mag. They mike .359" and shoot like a dream from my Beretta 92 without any leading. Also, bell that case mouth and insert those bullets straight. Don't rely on your seater to straighten them out. |
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Well for what it's worth, I cast my own 9MM lead bullets using a Lee Tumble Lube mold
in 124Gr. I shoot these out of my Glock 19 with a Wolf barrel. ( Yes thats right, I'm shootiing lead bullets out of my Glock) My load is AA#5 with 5.6 grains of powder, matched with a 124 Gr round nose Tumble Lube bullet. My accuracy is amazing, and I can literally shoot out the center of a paper plate all day long at about 15 to 20 yards. Just my .02 |
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Quoted:
Well for what it's worth, I cast my own 9MM lead bullets using a Lee Tumble Lube mold in 124Gr. I shoot these out of my Glock 19 with a Wolf barrel. ( Yes thats right, I'm shootiing lead bullets out of my Glock) My load is AA#5 with 5.6 grains of powder, matched with a 124 Gr round nose Tumble Lube bullet. My accuracy is amazing, and I can literally shoot out the center of a paper plate all day long at about 15 to 20 yards. Just my .02 I cast the same bullet. I lube w/ Rooster Jacket lube. I load w/ 3.5 grains Bullseye. It's a reduced load but it works great for me. These get shot primarily out of a SigPro 2022. They are amazingly accurate. |
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Quoted:
Quoted:
If you are shooting a euro barrel like a glock or high power they are not designed for lead. The lands are not as tall. Also, work up a load. .1 grains of powder at a time, ten rounds per increment. Go out and shoot off bags. BS The lands are plenty tall. The issue with the Sig, as well as with most 9mm's, is it has a huge throat. It will swallow .360" bullets. I suggest you get some Laser Cast 125gr FP designed for the 357 Mag. They mike .359" and shoot like a dream from my Beretta 92 without any leading. Also, bell that case mouth and insert those bullets straight. Don't rely on your seater to straighten them out. So you've measured them? What's plenty tall? Look at a reamer and see if shorter lands don't make for a larger throat. |
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Quoted:
Quoted:
Quoted:
If you are shooting a euro barrel like a glock or high power they are not designed for lead. The lands are not as tall. Also, work up a load. .1 grains of powder at a time, ten rounds per increment. Go out and shoot off bags. BS The lands are plenty tall. The issue with the Sig, as well as with most 9mm's, is it has a huge throat. It will swallow .360" bullets. I suggest you get some Laser Cast 125gr FP designed for the 357 Mag. They mike .359" and shoot like a dream from my Beretta 92 without any leading. Also, bell that case mouth and insert those bullets straight. Don't rely on your seater to straighten them out. So you've measured them? What's plenty tall? Look at a reamer and see if shorter lands don't make for a larger throat. The height of the lands has nothing to do with throat diameter. Throat diameter is the freebore forward of the casemouth before the lands even start. |
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Quoted:
Well for what it's worth, I cast my own 9MM lead bullets using a Lee Tumble Lube mold in 124Gr. I shoot these out of my Glock 19 with a Wolf barrel. ( Yes thats right, I'm shootiing lead bullets out of my Glock) My load is AA#5 with 5.6 grains of powder, matched with a 124 Gr round nose Tumble Lube bullet. My accuracy is amazing, and I can literally shoot out the center of a paper plate all day long at about 15 to 20 yards. Just my .02 You can shoot lead from your Glock because you aren't using the Glock barrel. I do the same thing with my 10mm Glock and will do the same with my G21 when I get it. |
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Quoted:
ok, regardless of land size and all that. what do you guys list for the starting load for 125 gr lead with bullseye. thanks It's not a land height issue. It is a bullet diameter issue. If your throat measures .360" and you are shooting .355" bullets, the bore will lead-up in no time and accuracy will go to hell. That is why I suggested .359" bullets. They will seal the system and keep all the propellant gasses behind the bullet. .355" bullets sitting in .360" throats allow propellant gasses to overtake the bullet and lead-up the bore by gas-cutting the bullet shank. |
| I tried for years to get a good 125gr lead load in 9mm but never found what I was looking for. I wasn't eager to go over 1000fps with a lead bullet and everything under that just wouldn't shoot very well. I just switched back to the 115gr FMJ and loaded them around 1100fps and am back to great accuracy from my guns. |
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