I am new to reloading and reading the'Modern Reloading' book and found something interesting. The book stated that tumblers can create lead 'dust' or deposits from cleaning out the cases.Also media left behind in the case can cause increased pressure and problems. It stated that it is better to polish them with steel wool etc. What do you all do? How would you clean the inside of the case them?
Second, does anyone reload 7mm Rem. Mags and want to pass on a good load to start with? Powder, bullet brand and/or primers? I am hunting deer here in VA and would probably go no more than a 140g bullet.My shots would probably be between 100-200 yds out.
I always clean my brass before loading. Cleancases are easier to inspect for problems.As for media in the brass, you obviously need to get it out and make sure the flash hole is clear.
I tumble all my brass. Just make sure you smack the backside to get any media out.It really isn't needed to get them sparkling clean. Just make sure thereisn't any grit that could scratch the chamber.
60 gr of IMR4831 with a 140 gr works for me.
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Tumbling is a nasty buisness, the krazy cloth does a nice job of removing 90percent of the grime with just a quick rub, and it doesent carry with lead dush hazzards of a tumbler. I very rarely use my tumber anymore, And even when I do, mines rotary, not quite as violent as a vibrating unit.
I use something similar to that, a lead removal cloth. I Use a Lee case trimmer chucked up in a drill, trim, chamfer, then clean the brass allat once. The downside is that it doesn't remove the grit and crud from inside of the brass.
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I always tumble my cases before de-capping. Use a lot of cases picked up from ranges and want to look at them really good.If a really accurate load is my goal, I will use a primer pocket uniformer and chamfer the flash hole. This also takes care of media in the flash hole. Never did worry about lead in the media and will not start now.
I haven't had any problems with media staying in the case. I just look them over good first and evey now-n-then I have to knock a peice of cob out with a case brush or sometimes I use a 3 inch screw (it was just lying around and worked).
I have had great success with this load for my 7mm mag.
Case Length: Standard OAL
Powder: 63.5 grains of IMR4831
Primer:Federal Magnum primers
Bullet: Hornady Boattail Spire Point
I have gotten 3/8" groups from my Ruger No. 1 w/this load.
To tumble or not to tumble...
