Lyman 356637 mould

[rufous03]

Just received a Lyman 9mm 147 grain mould (356637). First bullets cast appear to be 158-160 grain and measure .359 on final cast. I am not too sure what the content of the lead being used, but it is hard and bullets look perfect. Resizing to .355 is a bit difficult and since the bullet is bevel based, lube gathers around the base. (1) does anyone have an idea as to why the cast is 158-160 grains (2) how do I deal with the lube around the base? I use the same material for .45ACP and do not have a problem.
As a test I cast pure lead and ended up with 161.4 grain bullets.

[pistolshooter]

With the mix I use, I come up with a 157gn .358+ boolit that I size to 357. Another member here had the idea to make a little puddle of hot glue and sit the base of the boolit in it until the glue covers the taper. After it sits up for a minute, slide a 9mm case over the boolit to cut out a disc of glue. Peel the disc off the boolit and use it as a gasket between the sizer piston and the boolit. I made a few of these for each boolit that I cast with a bevel base, and it seems to do the job.

[petroid]

I just got the same mold and can only assume that alloy differences are the reason the weights are different. I don't know what alloy was used to design the mold but I'm guessing its lyman #2

[rufous03]

What weight are you getting? wheel weights are the basis for my alloy and cast a few using pure lead and came up with 161.3 grains which Lyman tech said was about right. I have not had a chance to test fire the 155-158 grain bullets yet, but thing they will be a tad heavy for the 9mm, fortunately I have a friend that shoots 38 super and is interested in the mould or I would return it to Lyman with samples. That still does not solve my problem. Thanks for the input guys.

[rufous03]

With the mix I use, I come up with a 157gn .358+ boolit that I size to 357. Another member here had the idea to make a little puddle of hot glue and sit the base of the boolit in it until the glue covers the taper. After it sits up for a minute, slide a 9mm case over the boolit to cut out a disc of glue. Peel the disc off the boolit and use it as a gasket between the sizer piston and the boolit. I made a few of these for each boolit that I cast with a bevel base, and it seems to do the job.
Sounds like a great idea, I will give it a test.

[petroid]

I am waiting for handles. Haven't cast any yet...

[petroid]

What weight are you getting? wheel weights are the basis for my alloy and cast a few using pure lead and came up with 161.3 grains which Lyman tech said was about right.

Ok, got some handles and cast some boolits up today. Mine dropped at .356 on one side and up to .358 on another side but mostly .357. Weight was 156.6+-0.3gr. Alloy was COWW +1%Tin. I took about 80 or so and powder coated to send to a buddy to load in 38Sp. With the PC they're well over .358 so he's going to get a Lee push through sizer and have at!

[rufous03]

Ok, got some handles and cast some boolits up today. Mine dropped at .356 on one side and up to .358 on another side but mostly .357. Weight was 156.6+-0.3gr. Alloy was COWW +1%Tin. I took about 80 or so and powder coated to send to a buddy to load in 38Sp. With the PC they're well over .358 so he's going to get a Lee push through sizer and have at!
Sent the mould back to Lyman with samples, similar problem when it comes the sizing, seems to size one side more than the other, but they do seem to shoot well out of my 9mm with IMR 4756 powder ( 3.6 grains) lube sizing is a bit of a pain in the *** because of the bevel base and squeezing them down from .358 to .356. I will let you know what Lyman comes up with. Thanks for your information.