New Lyman 358 & 431 H & I dies sticking bullets in both dies. Bought last year & today.
The old style dies in 357 & 429 work fine in my Lyman 450. Exact same conditions.
For about 40+ years, been sizing to match barrel groove diameter .
New dies are to match cylinder throats.
Question- Are these new style dies giving you problems??
The fix- Polished both dies with 320 paper on a wood bowel. Now work as they should.
Thank you.