Hello all,

I will risk boring you to tears once again with my 375 questions. I know the long answer to my question. Just wondered if anyone had measured the throat on their 375WIN Marlin. Mine was made in 1980, and is in excellent condition. I am searching for a new cast bullet mold for the gun. I wondered if anyone had played with a WFN design for this gun, or if that is out of the question beccause of its throat. I have yet to measure its chamber yet, and was wondering if anyone else had. The issue comes up because I can shoot such a large metplat out of my 357 mag carbine, that it "cuts a bigger hole than my 358win(small throat). The metplat on the BTB 250gr. is .245. I wondered if anyone would venture a guess as to a limit on the metplat available to be able to be shot in a gun like this?. Mountain Molds cuts very nice molds, and I wondered if I could design something with a little bigger metplat for what seems to be a very large throat. The Lee bullet and BTB both seem almost lost inside the throat, even seated to 2.585. Any ideas?

A quick way to answer this is may be just loosely seat the BTB backwards in the case and chamber it to see what the overall length ends up being. If you have a soft Lee bullet that might be a better measuring stick.

I haven't done much work with either of my rifles. The Hornady's shoot so well I'm not sure I want to mess with it for a while.

I have to agree, Michael. The Hornady's certainly do a job. I also think that if the Lee's work for a plinker, that I am set. I havn't gotten out to use my 1600fps load that Slim picked above. Still, though, part of the attraction to those of us that don't have hogs around, is to "mess with our guns". :confused: It is a form of frustrated hunter in the off season. i have lapped the gun, and that GREATLY increased my accuracy with the Lee. I didn't shoot the BTB before I lapped, so I can't compare the accuracy with it. It is not as accurate for me as the Hornady or Sierra, but it is certainly acceptable. Best group was around 1.5 in. at 100.

Yeah MikeyG and I did some hog hunting yesterday evening but he better explain things...

Doc -

I haven't measured the throat on my Marlin (also 1980 vintage), but the chamber is long enough to accept .38-55 brass with no problem.

So far I've seated the Sierra 200 and Hornady 220 to the cannelure, crimped and called it good - haven't tried any hardcast.

Yeah MikeyG and I did some hog hunting yesterday evening but he better explain things...

*Ahem* - it's called "conservation" when you don't actually manage to kill one..... :o

Sorry about your loss, guys :rolleyes: I'll guess your going out this evening or in the morning...I measured the chamber, and it looks like it easily will do a 75% metplat. That comes out to just over .28.. Thats the same as my metplat on the 357, but going a bit faster. I wonder if that would be too nose heavy.

Dr. A,

Like Coyote Hunter, I load 38-55 brass with the 200 Sierra and the 220 Hornady for both the Marlin M375 and the Winchester BB94/.375. I don't know the year of mfg but the serial no. on the BB94 is BB0140XX.