Lyman M die users

[Raydee38]

I am loading 223 on my Xl650 and am having a issue with brass shaving off my bullets when loading. I am using the Dillon RT-1200 trimmer which everyone knows sizes the case mouth a little tight to seat your bullets after. What I have been doing is manually deburring and chamferring the cases which is pretty time consuming. I see that some of the jacket on my bullets are being shaved when loading BUT they are tight enough where I don't have to crimp any of my rounds which I do like. If I decided to use a Lyman M die to stop the shaving of the jackets will I have to crimp each round after? It's probably debatable but is shaving a little of the bullets jacket really a big deal?

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[caspian guy]

I use an m die specifically to avoid that issue (and to avoid having to chamfer.) I have the m die adjusted to just barely open the case miuth. I do have a dillon crimp die in the tool head and I have it adjusted to just remove the bell the m die imparts. That has worked well for me.

[Beastly]

M-Die for the win with flat base bulllets.

Also recommend this: http://ballistictools.com/store/case-mouth-gage-224-308

Little-no crimp required to 'fix' minimal M-die expansion.

You already get tons of neck tension with the Dillon size/trim gauge.

[Spanners]

Just run the backup rod/die in the swage station

Its basically a M die

[Raydee38]

Just run the backup rod/die in the swage station

Its basically a M die

I am not understanding what you mean.

[Spanners]

See below pic stolen from Mr Bullet Feeders Page

The backup rod has expander section in it. (middle part with arrow)

Just install it in a station after your trimmer

I havnt trimmed up any of my rods

Edited November 14, 2015 by Spanners

[Raydee38]

OK that must be from the Super 1050 reloader?

[Spanners]

Sorry.. have reread. I skimmed the 1st post and saw 1200 there.. computed that into 1050.. as I'm ordering parts for my 1050s etc and have it on my mind.

You dont have a 1050, thus you dont already have one......

Either way, that or a M die will work

Try a normal resizing die in the last station if you can get it to fit and back it off a turn or so and see what the burr is like.. should wipe it out

[Raydee38]

Ok I will try that.

[beerman]

i will fit my M die in station 5 next time i load 223, need to treat the blue collar on the trimmer.

the dies i use:

#1 RCBS lube die

#2 Forster F/L size die (just to ensure case mouths are round and size 2/3 of the case)

#3 empty

#4 RT-1200

#5 M die.

[Raydee38]

Well I got my M die in the mail today. I got it all setup and ran some flat base bullets through the press. The necks are still tight but I am not noticing and shavings from the bullets so I am guessing it is working right. The instructions on the die say that you can screw it down some more and kind of bell 1/16" of the top of the case for cast bullets but I am guessing I won't need to do that. Since I don't normally crimp flat base bullets I tried forcing the bullet in the case to see if the neck tension was enough and the bullet did not budge so I think it is good to go. I will have to load some boat tails next and see how they work, I will probably put a light crimp on those like normal just to be safe.

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[JatCarver]

Instead of starting a new thread I will ask here, anyone else have there M die stick while its pulling out of the case mouth jarring the press a little. I tried polishing it and it didn't make any difference.

[Beastly]

Do you wet clean your brass?

[mcracco]

Instead of starting a new thread I will ask here, anyone else have there M die stick while its pulling out of the case mouth jarring the press a little. I tried polishing it and it didn't make any difference.

I run 223/300 BO brass in quantity on 1050's and when the case is in position 7 (empty) I will run a lubed brush down the neck. Doesn't take any extra time and the benefit is the brush removes chips and applies lube to make the expanding operation easier.

[roxfo]

anyone else have there M die stick while its pulling out of the case mouth jarring the press a little. I tried polishing it and it didn't make any difference.

I used to get a bit of sticking when I expanded with M dies. These days I use a Sinclair expander with floating carbide mandrel, which reduces the sticking, then flare a little with an M die with a custom mandrel; the first part is fractionally undersize and just serves as a pilot, so it is flaring only and doesn't stick.