Ruger 15151
Member
I use Lyman resizing dies when I am loading 9mm. Because Lee sizing dies size the cases down to .371 and I primarily use .3555 plated bullets, I had a problem with hour glass shaped reloads and the bulge was not always even around the case. This occurs even when I have about a .002 flar and am careful to seat the bullet flat. I always use a Lee FCD so all my loads cycle fine.
The Lyman M Series Expander Die seems to have been the solution, The first step expands the case and a second step creates a step for the bullet to sit on. Now I only get a slight bulge every 20 cases so I am very happy with these expanders.
However, I know neck tension is extremely important to accuracy in 9mm. The second step creates a shelf down about a 1/16 of an inch. Even though I use a Lee taper FCD to crimp a .3555 diameter platted bullet to .376-.377
I am curious if anyone has experience with the Lyman M Series Expander Die. Have you noticed any additional powder burn along the case or expienced any negative effect on accuracy.
EDIT - I am referring to the Lyman M-Series Expander dies. Thanks for the correction.
The Lyman M Series Expander Die seems to have been the solution, The first step expands the case and a second step creates a step for the bullet to sit on. Now I only get a slight bulge every 20 cases so I am very happy with these expanders.
However, I know neck tension is extremely important to accuracy in 9mm. The second step creates a shelf down about a 1/16 of an inch. Even though I use a Lee taper FCD to crimp a .3555 diameter platted bullet to .376-.377
I am curious if anyone has experience with the Lyman M Series Expander Die. Have you noticed any additional powder burn along the case or expienced any negative effect on accuracy.
EDIT - I am referring to the Lyman M-Series Expander dies. Thanks for the correction.
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