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Posted: 1/5/2015 9:34:52 PM EDT
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I have loaded many 9MM in the past with no problems. I recently got some 124 gr, 9MM from the Missouri Bullet Company and have problems.
Here are the bullets: 
Here are WWB in the CZ 75 SP-01 barrel, note fully seated. 
Here are my reloads in the same barrel, note, not fully seated 
When shooting, I get many FTF due to the slide not going into battery. It seems that the nose of the bullet is not tapered enough to fit into the barrel. Could these be defective bullets? |
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The good old "small ball" topic comes around couple time a yr..
Seat them deeper... that long bearing surface is sticking out of case mouth too much, and jamming into the throat of the barrel.. You will need to rework your load powder charge wise as the deeper seating will reduce available space for powder.. |
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Quoted:
The good old "small ball" topic comes around couple time a yr.. Seat them deeper... that long bearing surface is sticking out of case mouth too much, and jamming into the throat of the barrel.. You will need to rework your load powder charge wise as the deeper seating will reduce available space for powder.. How much deeper would you guess. That is a fairly light load of Bulls Eye. Maybe I should try them in my Taurus P92? |
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Quoted:
How much deeper would you guess. Quoted:
Quoted:
The good old "small ball" topic comes around couple time a yr.. Seat them deeper... that long bearing surface is sticking out of case mouth too much, and jamming into the throat of the barrel.. You will need to rework your load powder charge wise as the deeper seating will reduce available space for powder.. How much deeper would you guess. Seat them till they freely drop in the barrel without bearing surface jamming in throat.. measure and save number, that be OAL for that barrel/firearm |
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Quoted: The good old "small ball" topic comes around couple time a yr.. Seat them deeper... that long bearing surface is sticking out of case mouth too much, and jamming into the throat of the barrel.. You will need to rework your load powder charge wise as the deeper seating will reduce available space for powder..  I recently had the same problem in 45 ACP. Same shape blunt RN home cast bullet. (the Lee 6 cavity die) At 1.250 OAL they would fail to close the slide fully. Seated to 1.21 they functioned perfectly. My loads were a full grain under the max listed, so I stayed with my powder charge and was GTG.
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How I figured it out -
1. Take the barrel out of your pistol. 2. Place a sized case in the chamber (case is indexing off chamber as intended). 3. Measure the depth of the case head relative to the breech end of the barrel/chamber (use your caliper's depth feature). 4. Seat a bullet in that same case, making it intentionally long. 5. Place the case back in the chamber and re-measure the depth (it should be less deep than in step 3 because the bullet is sitting on the lead/rifling). 6. Reseat bullet a little deeper and remeasure depth. 7. Repeat until depth measured in step 3 is again obtained. 8. Remove case from chamber and measure its OAL (case head to tip of bullet). This is the max OAL that will index off the case mouth in your pistol. I took about 0.010" off this dimension to account for variable (shorter) case lengths. IIRC, this meant OAL = 1.235" for the 230 gr RNL bullets I was using. They function and feed better than ever before. I did the same measurements before loading up my 9mm loads. I just don't recall the numbers well enough to quote them. |
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thats the way they are. they start tapering a bit farther up. if you just bought a few hundred i would either use them in another gun that it works better in or trade/sell them. Anyways, with coated bullets so close to lead there are few reasons to go straight lead anymore.
grab some bayous and you won't need to deal with the issue anymore http://www.bayoubullets.net/9mm-124-gr-rn-500-ct/ |
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