sharp3x@mac.com
sharp3x@mac.com
3 posts
Joined October 2020

Redding Dies for 300 Win Mag

Hello,
I'm getting ready to load my first big bore, 300 Win Mag in my 550B. This is my first foray into using non Dillon dies. Dillon makes it so easy, I was disappointed that Dillon doesn't carry dies for 300WM. So I bought a set of Redding "deluxe" 3 Die set. It has the Decapping die, ST B1, and FL A1. I am confused. I think I might've bought the wrong dies, as a neophite with dies other than Dillon, I can't figure out what goes where after the decapping die, and powder measure etc. . After I ordered these I think I saw that Redding had 300 WM "progressive" die set. Is that by chance what I want instead of the "Deluxe" die set? It struck me odd that when I was looking for 300 Win Mag dies, these were the only ones I could find in stock. I thought Yea I found a 300WM die set.....! Since I have loaded a lot of pistol, and 223/5.56, this is a whole new world to me. Could use some guidance as I just don't understand what I have, and frankly what I might need. HEEEEELP!
Thank you
Jon
tet301
tet301
52 posts
Joined February 2016

RE: Redding Dies for 300 Win Mag

Hello Jon,
Here is how I would approach it. You will need the Dillon # B shellplate for that caliber and in station two, the standard powder die. That bullet diameter requires the 544B Dillon powder funnel.
The Redding deluxe set comes with two size/decap dies: one a full length resize die and the other a neck size die. If your brass is all fired out of your rifle, you should be able to get by with just neck sizing, which is easier on the brass and will minimize case stretching. If your brass comes from other rifles, then I suggest you play it safe and use full length size. Remember to screw the die all the way down to the shell plate for your initial test case.
Immediately after sizing, you'll need to measure your resized brass. If the sized length exceeds 2.620" you'll need to trim your brass back to 2.610". Now that you are decapped, primed, resized and trimmed, your case can be rotated to station two for powder charging. I believe the Redding Deluxe Die Set uses one die for seating and crimping and that die will go in station three of your tool head. When setting this die, I tend to raise that die fairly high then screw the seater down to set the OAL for my first round. Since there was no crimp, I then unscrew the seater and screw the crimp die down until the final adjustment of my crimp. When my crimp is set, tighten the die nut and THEN, with a round in the die, screw down the seater until it makes contact with the round. Check this adjustment with your next round and if your OAL is correct and consistent, you are fully adjusted and ready to make ammo.

Best,

Terry
sharp3x@mac.com
sharp3x@mac.com
3 posts
Joined October 2020

RE: Redding Dies for 300 Win Mag

Terry,
Thank you so much!!!! I really appreciate it! Since this is not only my first time with something this big that is more complex, it is also my first post. And Thank you again for the help! I've been a "lurker" so to speak for a while, and have learned much from the wisdom here. I should have mentioned that I did get the Dillon 300WM caliber conversion kit. I have been thrown so many different things. I look at the powder funnel, and since all I have seen is the "male" type flaring powder funnel, and ask where does the case get flared to hold the bullet for seating at station 3? The couple of cases I have run through the station 1 de-cap and sized are running between 3.610-3.615" so good there. The cases are once fired. The bullets are Nosler Accubond. As I looked through the Dillon stuff, I realized that I need a Magnum powder bar. I thought I got this large powder bar that would be correct. Noooo.... I guess another bit of a curve but heading up the the curve. So..... I have the ST seating die in station 3. The FL A1 die has a threaded insert that has a collet on the insert that looks like it does the case flaring. So now I'm really confused. Its almost like this set of dies for a single station press like my Dad used to use. Hmm. My plan is to make 5 rounds, head to the range, adjust, 5 more or so on until I have a happy setup. Then make 50 or so knowing this is not the crank through 200-300 per hour 9mm, and 100 or so per hour 223. So I guess my next question is.., and thank you for your help, and now patience. If you have any thoughts of how to go from here my ears are wide open and cupped....
Jon
Oro Valley Az.
tet301
tet301
52 posts
Joined February 2016

RE: Redding Dies for 300 Win Mag

I think your analysis is correct so far. It is also possible to charge the case with a large powder bar by running the handle twice (dropping a half charge each time) pulling your case out of station one before running it the second time. I would only do this UNTIL you can receive and install the correct powder bar.
In bottle neck rifle calibers, the case mouth is expanded by the little knob looking attachment on the threaded decapping rod just up from the decapping pin and locking nut.
Lastly, your approach to testing your ammunition is spot on. It is certainly possible for any of us to make a mistake so you are wise to be careful. Once your rounds are functioning correctly, you can move to the next phase of working up the recipe that your rifle "likes".
sharp3x@mac.com
sharp3x@mac.com
3 posts
Joined October 2020

RE: Redding Dies for 300 Win Mag

First, THANK YOU FOR YOUR HELP!!!!! There is progress, thanks to you! I put the ST B1 die in position 3, found that it sets and crimps. I was so hung up on the "flare". So what I did, was ran through st 1, 2, and at st 3 just slid the bullet up the set die and slowly raised the platform while holding the bullet in my fingers, engaged the bullet into the case and continued raising the platform. Rinse repeat until the OAL was 3.340"., per Hodgdon and Lyman. It has a nice crimp. The first case OAL was 2.610". So far so good! My remaining question for the moment...., Is this the published OAL of the completed round is 3.340", which leaves the knurled portion of the bullet about .050" short of entering the case...Wondering if there are any thoughts about whether I should shorten the OAL to get the knurl into the case. I don't have a round here to check a factory length...
Jon
tet301
tet301
52 posts
Joined February 2016

RE: Redding Dies for 300 Win Mag

Your OAL matches the data I have, so with that, I think you've got a great starting point. Now you can begin the process of shooting your product and experimenting to find out what formula (bullet, powder, weight, primer and COL) works best in your rifle.
You can probably tell that I enjoy my reloading hobby immensely. That's not to say that all is (or has been) smooth. But the reloading fraternity is a very good bunch of characters and most are eager to help. My email is tetobias@varnumlaw.com and I am more easily reached that way. I'm very interested in the results from and your range visit.

Best

Terry