Lyman 311410

CWLONGSHOT

Well-Known Member
I have been wanting to try this mold. Been watching sales and missed a couple times or they sold for too much $$.

I am lucky to have a very good friend with a plethora if molds and kind enough to share there use.

Yesterday, I borrowed four molds. I dont like to borrow more then this at a time. So when these 4 are all cast Ill return and swap for a few other including this 410 mold.

Any experience here with this mold? Wanting to try in 300 BO.

CW
 

Rick

Moderator
Staff member
I have three of this mold. A single cavity Lyman HP. Two MP brass four cavity all HP with a pile of various pins. One is all GC and one is all PB. Have only done some testing with the PB in my Ruger BH 30 Carbine. Shows much promise.
 

RicinYakima

High Steppes of Eastern Washington
I have had two of the Lyman single cavity moulds from the 1960's when this was designed for the just released 30 Carbines. Both noses were about .297" and the bands .311" and didn't shoot well in anything, BUT would make the Carbine function with 5.5-6.0 grains of Unique. My Carbine shooting friends say the new spec moulds are much better. FWIW
 

CWLONGSHOT

Well-Known Member
Since I went back this AM I grabbed this mold today.

I was pleasantly surprised it was a PB version! (They are stored submerged in 90#) So a good soalk in HOT HOT water with Dawn and a ol tooth brush, makes they squeaky. I let them set in the hot plate for a hour and cast up all molds. Just a hand full each.

Baking the last batch now reading the forum. Good looking lil bullet!!

34F848BA-9695-4957-9B1D-419F51C0D623.jpeg587F8DEF-B77B-4DA2-B71A-6667EA2E7F8B.jpeg
 

Ian

Notorious member
I have the MP HP and it doesn't shoot well in anything. The nose shape isn't right where it transitions from bore to full diameter, it's too convex causing the bullet to gimble in the throat (have trapped bullets and nothing I shot them from would launch them straight). The Lyman one in the photo appears to have a much better approach curve in front of the full diameter section and ought to shoot well.
 

Ian

Notorious member
As an aside, I have had excellent results from the 120-grain Lee 2R plain based round nose bullet, and it has a nice taper to fit most leade angles well.
 

Rick

Moderator
Staff member
I honchoed the 311410 MP group buy, when the drawing went to MP I had changed the original Lyman design by adding a full diameter front driving band. That didn't turn out as well as I had hoped but it is there, kinda. Here is the MP 311410 on left compared to the Lyman on the right.

Half check-1.jpg Lyman 311410 HP small.jpg

You might also enjoy my invention of the half check bullet on the MP.
 

Rick

Moderator
Staff member
Interesting concept on how to cut the cost of gas check in half... ;)

That's what happens when ya get two molds in the mail, take them apart and clean them & put them together and start casting. Didn't take very many pours before I looked down and thought . . . . Oh that just can't be right. It does however say a lot about how well mold blocks from two different MP mold's fit together.
 

Thumbcocker

Active Member
I have that mold in 2 cavity from Lyman. It functions in a .30 carbine and grouped better than the Chinese berdan primed ball that was common in the 90's. That even had LC52 on the case. It suprised me for a plain based boolit. Powders were 4227 and 2400.

It also does ok in a .30 carbine Blackhawk.

The Lee "soup can" has been a good gas check boolit.
 

Ian

Notorious member
I honchoed the 311410 MP group buy, when the drawing went to MP I had changed the original Lyman design by adding a full diameter front driving band. That didn't turn out as well as I had hoped but it is there. Here is the MP 311410 on left compared to the Lyman on the right.

View attachment 26208 View attachment 26209

You might also enjoy my invention of the half check bullet on the MP.

Too bad they screwed it up, that Lyman bullet looks perfect.
 

Rick

Moderator
Staff member
Too bad they screwed it up, that Lyman bullet looks perfect.

Lyman not perfect in a revolver, I wanted the front driving band to fit correctly in the throat. MP didn't get the full band cut correctly but it is there. Kinda.
 

Ian

Notorious member
Lyman not perfect in a revolver, I wanted the front driving band to fit correctly in the throat. MP didn't get the full band cut correctly but it is there. Kinda.

Lyman didn't design it for revolvers. I wanted something for rifles and the MP mould ain't it.