Re: Anyone own a 7mm 300 Win Mag?
Well, this is the caliber that I am going to use after reading the whole thread and developing a slight headache in the process... I was going to chamber in 7stw, but I think that the 7-300 has a lot to offer, it will allow me to use my existing DBM with a 3.715" magazine for a 300WM, and brass should be easier to find.
But holy cow there seem to be more variations than you can shake a stick at! I have been reloading for several years, but this will be my first go around with a wildcat cartridge. I would think that to keep it simple, and since I can find dies for a 7-300, that it would be easier just to go with the "normal" 7-300? I know that many have had good results with the improved shoulders, but to do that you would be looking at custom dies correct?
I am going to use a 28" 5c 8.5 twist barrel, either from Brux , Benchmark or maybe Pac-Nor. Probably in a light varmint or maybe a Sendero contour. I do not yet know what smith I am going to use, but if they already have a 7-300 reamer, do I need to buy one from PTG, or is that normally done just so you can have your own specific reamer for an improved version of the 7-300? I would assume if they have a reamer that they can set the throat up to shoot the 180gr Bergers or the 195's if they ever come out?
I guess if I go with Benchmark or Pac-Nor then it looks as if they already have the reamers so maybe I can just have them do all of the gunsmithing to simplify things. This is really a whole different ball game for me so I have so many questions, and I would much rather do it once and do it right.
I have read where some people are stepping down the neck diameters when re-sizing, and it seems that others just run it through the 7-300 dies to get it right. I already have a neck reamer so I can do that, and I have annealed several of my existing cases with a simple drill and torch setup so that is taken care of, but I have never used a bushing die setup. I understand how it works, just never used one. I guess that I could buy a bushing die and do it like Broz has done, stepping down bushings to get the neck diameter to where it needs to be, I just do not know if this is necissary.
Thanks for whatever guidance you guys can offer. I guess it will be done one step at a time and then it will get there!
Army Field Artillery