Case fillers

30 November 2003, 01:53

David Foberg

Case fillers

I just ran across an article on another web site about using a new filler and was wondering what you guys thought about it.here's the article http://www.surplusrifle.com/shooting/castfiller/index.asp And here's the fillerhttp://www.precisionreloading.com/2002catalog.htm look under reloading components then buffer.

30 November 2003, 02:31

aladin

quote:
Originally posted by David Foberg:
I just ran across an article on another web site about using a new filler and was wondering what you guys thought about it.here's the article http://www.surplusrifle.com/shooting/castfiller/index.asp And here's the fillerhttp://www.precisionreloading.com/2002catalog.htm look under reloading components then buffer.

David their method of simply adding the filler wt to the bullet isn't going to hold true for faster fuels at higher loading densities [of filler]. The stuff costs over $20 a pound too.

I anwered about the same question yesterday on another channel. The gist of which is using case fillers IMO is an advanced technique, where radically changing the expansion ratio of the case does not lend itself to simple calculations of potential CUP going to the faster speed fuels.

Note the article used 4198 which shines with a filler. Go to a flake powder of slightly faster speed and forget fillers, as they work quite well minus them.

30 November 2003, 04:45

Deputy Al

David--

I am among the tribe who DOES NOT use fillers. I don't mean to undercut their hobby effort, because fillers do work--their use can enhance accuracy markedly.

My reservations have to do with the inability of the experts in the field to be able to reliably produce the negative effects of fillers--pressure excursions and detonations--in a lab setting. Essentially, this produces a situation where the experts cannot say WHY it occurs. If they can't pin down the "why it does", then isolating the "why it doesn't" is even more elusive. My response--don't go there at all.

Flake powders are largely not position sensitive, and I use a lot of these powders in both rifle and pistol cast boolit loads. Another departure to resolve the powder position issue is to use "slow for application" powders in a given cartridge/caliber, using a case full of the slower powder. This has worked very well for me in the 45-70......powders chosen among WC-860, WC-852 fast and slow lots, and other "stick" powders provides velocities from black powder through retina-detacher levels in the 7# Ruger #1.