Lee 356-125-2R bullet deep seating issues?

[CastFANatic]

Hi all. I am looking for a mold to cast 9mm for my glock 26. I have an aftermarket barrel so lead boolits are A O.K. My question is with this boolit do you have to seet the boolet deeper than usual? The reason I ask this is i have a lee mold for the 220 gr RN 45 acp and have to seat those bullets way deeper than with any other cas 230 gr RN. I'm not that concerned with it in the 45 ACP, but with so little case capacity I am worried about creating a high pressure problem from having to seat them short.

If anybody on here uses the Lee 356-125-2R mold can you inform me of any issues you have had with this design concerning seating and C.O.L.?

[CherokeeT]

I will be trying that bullet tomorrow for the first time.  I have match chamber Briley barrels in my 9mm's so I had to seat the bullet to an OAL of 1.065" to clear the rifling, about the same as Lyman's OAL for their 124 gr RN bullet.

[CastFANatic]

Cherokee thank you for the reply. Will youlet me know how they do? What did you size them to?

[CherokeeT]

I sized the bullets to .356 because that is what fits my barrels.  My OAL is 1.065", dictated by the tight match barrels since there is no lead for cast bullets.  The one ordinary 9mm barrel I have around would allow a 1.15" OAL and still not touch the rifling but that will not fit the match barrels.  BTW, these are 1911's, not Glock's.

[CherokeeT]

I shot this bullet at the indoor range today.  Function was 100% with my Witness, it has a ramped barrel.  The Caspian 1911 had feeding problem - the bullet nose would jam on the chamber feed ramp (not a ramped barrel) some time.  My Colt 1911 with the sloppy chamber ran 100%, also not a ramped barrel.  The chamber ramps appear the same so I can not see why the difference, maybe just luck.  Anyway, accuracy was good with the bullet using 231 powder.  I'm going to try it in the Para 1911 with a ramped barrel next time.  Hope this helps.