Poly fill in cases?

Witnessed it used at the range . A Buddy was shooting .303 , saw something white flying downrange just a few feet after a shot--- cotton balls . No probs. to the bore I was told .
Bought some dacron with intent to use in 45-70 light load , to date haven't tried it .
 
I used to use kapok as a filler in light unique-cast bullet 45-70 and 30-30 loads, found it wasn't required for proper consistent powder combustion. Kapok will sometimes appear like dandelion fluff in the air(no burning bits). Fibrefill is similar, must not be tamped down like a wad on top of powder, it should fill the airspace with light fluff. Hodgdon condemns the practice, and improperly? done, has been accused of chamber ringing.
 
Dryer lint works well too. Used it in light .303 loads and they fired uniformly.
Maybe be sure it's all natural lint (ie-no synthetic, meltable fibers) to be safe.
 
I started using the "pillow poly-fibre" trick in my .45-70 cases and noticed an improvement in more consistent velocities in my loads and a resulting accuracy improvement.
 
If you don't like poly, cream of wheat or oatmeal works well. I like to use a wax plug as well. The poly is only a filler so that you don't get detonation in the cartridge, rather than a controlled burn. Some shotgunners used to use a filler in between the shot, called Grex. I haven't seen it in years but it worked very well as a filler for cartridge cases, such as the 45-70 Govt, when using smokeless powders like 3031.
 
SandRoad said:
If you want an example of consistency, or lack of consistency in partially filled cartridge cases, take a look at this link where they experimented using a 38 Special and Unique. Very interesting data.

As for the validity? The test was done by Ken Oehler (yes, he is the same as the equipment)

http://www.canadiangunnutz.com/forum/showthread.php?t=290656
Click to expand...

According to that little expose we should all be loading filler materials in every round we reload.
 
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