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Lyman Neck Expanding Rifle "M" Dies
As Low As $33.99 Save Up to 15%
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Most Helpful Positive Review Lyman "M" die
To load cast bullets, I've learned the M Die is much more of a need than a "want". Both accuracy is increased and longer case life is achieved. Without using this die two noticeable phenomena are 1/ The cast bullet may get shaved by case or swaged as it is seated; and 2/ There is no consistency of the cases grip on the bullet -- ranging from a loose bullet to a bulged case. I finish my load with the Lee Factory Crimp die which insures a great grip.
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Makes seating cast bullets a breeze

by tires2burn, Verified Owner from WA, United States Written on February 23, 2022
I have a Lyman M-Die for every caliber I cast and they are the best. The bullet goes into the case straight and no shaved lead or Powder Coat. I even use them when I load FMJ just for that extra precision.
Would recommend: Yes
Was it helpful to you? Yes | No

Makes Loading Flat Based Bullets Easy

by Drew A, from PA, United States Written on May 25, 2021
Bells the case enough to make loading flat based bullets. Therefore the shoulder of the shell does not deform when seating and crimping. I was able to load 55 grain FMJ bullets without any problems.
Would recommend: Yes
Was it helpful to you? Yes | No

Excellent Product

by Van, from CO, United States Written on July 10, 2018
Lyman does always work exactly as expected. The M dies are excellent for neck sizing rifle brass. Using an M die will help you get the most accuracy from your reloads. Highly recommend for reloading.
Would recommend: Yes
Was it helpful to you? Yes | No

Lyman M die for 22 Hornet

by Caliboose, from OK, United States Written on January 27, 2017
I used one like this at my friends house and knew I would have to order one. It is the sure way to start a bullet properly aligned in the thin neck of the Hornet! Or to start a lead bullet in larger caliber brass, use the proper Lyman M die.
Would recommend: Yes
1 of 1 found the following review helpful.
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Lyman M Die for .308

by Hobbyman, Verified Owner from AZ, United States Written on April 25, 2016
Great die to have if you cast bullets.

It is recommended to use if you have a bullet feeder, it flares the neck allowing for a better seating when dropped by the feeder eliminating excess shaving of the projectiles.
Best Used for:
  • Cast Bullets
  • Bullet Feeder
Would recommend: Yes
1 of 1 found the following review helpful.
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neck-ecpanding "M"-die

by FranksSon, Verified Owner from FL, United States Written on March 1, 2016
a "must-have" when hand-loading cast-bullets for your rifle.
I have tried to load sized and lubricated cast lead bullets without using the "M" - die.
In most all instances, the bullet will shave lead in a properly resized case.
Reason - the cast-bullet and the neck size (from the sizer-die) are the same dimension.
So, if you're loading cast lead-bullets, this is die you've got to use.
Don't quibble - just get one"!
I now have them for my 30-30 & 308 Winchester & 35 Remington rifles.
Pros:
  • properly expands cases for cast lead bullets
Cons:
  • None.
Best Used for:
  • seating cast lead bullets
Would recommend: Yes
1 of 1 found the following review helpful.
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Lyman Neck Expanding Rifle "M" Die

by ozdude, from Australia Written on March 5, 2015
Great die though disappointed by the new lock rings Lyman now supplies.
The old ones were were fine, these new ones with the grub screw that tightens onto the threads are not an improvement but just a cost cutting measure.
Would recommend: Yes
1 of 1 found the following review helpful.
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M dies for resizing cast bullets

by Ric, from AZ, United States Written on January 29, 2015
The best way I have found to get thet cast bullet loaded without shaving lead off the side of you new cast projectile. I use one for each of my calibers, just makes reloading go so much more smoothly. One more tool made by Lyman that benefits the handloader big time. If you aren't using one, you need to start.
Would recommend: Yes
1 of 1 found the following review helpful.
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Lyman M dies

by Simon Peirce, from NSW, Australia Written on September 11, 2014
I have commenced loading hard cast polymer coated projectiles in .243 and .308, using standard dies was an issue as the gas check would enter easily but the standard belled case mouth would 'shave' the projectile. The M die has eliminated 'shaving the projectiles and ensured that I can now enjoy low cost practice!!!
Would recommend: Yes
1 of 1 found the following review helpful.
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Lyman M die

by Legacy Reviewer, from VA, United States Written on June 30, 2012
The M die is a must for cast bullet loaders. Lyman makes the best neck expander on the market.
Pros: quality
Cons: none
Would recommend: Yes
2 of 2 found the following review helpful.
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