lsippell
09-12-2017, 03:17 PM
I'm new to the 300 Blackout having just built my first one with an 8.5" barrel.
That said, I have had 4 Lee TL309-230-5R molds so far (another one should be here tomorrow). All cast way undersized. Lee said it was my casting technique or lead temp, but I was casting in two other Lee molds at the same time , a 9mm and a 45apc and they both cast 1 to 1.5 thousands over stated size while the TL309-230-5R was consistently under on an average of 3 to 4 thousands. I I use an air powered setup for sizing but the only force needed to put these bullets through the .309 sizer was pushing another bullet into it by hand.
I even sent one of the molds back to Lee and they sent it back and said it was in spec (wonder what their specifications are?).
I got so disgusted that I designed a bullet based on Accurate Molds 31-225B and the 31-215E with no lube grove since I use Hi-Tec coating. The new bullet # is 31-236S.
I ordered a 3 cavity mold of it today. I have one other mold from Accurate in 9mm and it is the best I have ever used.
The only trouble with the new mold is I've now got to wait 3 weeks to get it!:(
That said, I have had 4 Lee TL309-230-5R molds so far (another one should be here tomorrow). All cast way undersized. Lee said it was my casting technique or lead temp, but I was casting in two other Lee molds at the same time , a 9mm and a 45apc and they both cast 1 to 1.5 thousands over stated size while the TL309-230-5R was consistently under on an average of 3 to 4 thousands. I I use an air powered setup for sizing but the only force needed to put these bullets through the .309 sizer was pushing another bullet into it by hand.
I even sent one of the molds back to Lee and they sent it back and said it was in spec (wonder what their specifications are?).
I got so disgusted that I designed a bullet based on Accurate Molds 31-225B and the 31-215E with no lube grove since I use Hi-Tec coating. The new bullet # is 31-236S.
I ordered a 3 cavity mold of it today. I have one other mold from Accurate in 9mm and it is the best I have ever used.
The only trouble with the new mold is I've now got to wait 3 weeks to get it!:(