I have the wad cutter die for my 4570
in my 4570 I cut wads out of milk container made of wax carton
can I use this in the 458 Winchester Magnum to keep the powder in a slight compressed mode
using 5 to 10 at the most

That makes excellent wad material for compressing black powder loads.
Smokeless loads in the 90% to 100% range of net fill/LR benefit little from the complication.
And when you reduce a load, adding a wad to it brings the velocity back up a little.
But that would not stop me from trying it.

A flurry of waxed cardboard wads might make your chronograph unreliable at 5 yards distance.
Might move the chronograph out to where you see it will be beyond the wad trajectory.
Judge that from the confetti on the ground.

Why not use Kapok?

quote:

Judge

what about 1/2 inch foam baking
would that be better

quote:

Originally posted by RIP:
That makes excellent wad material for compressing black powder loads.
Smokeless loads in the 90% to 100% range of net fill/LR benefit little from the complication.
And when you reduce a load, adding a wad to it brings the velocity back up a little.
But that would not stop me from trying it.

A flurry of waxed cardboard wads might make your chronograph unreliable at 5 yards distance.
Might move the chronograph out to where you see it will be beyond the wad trajectory.
Judge that from the confetti on the ground.

mmmm I see. I like the idea of 1/2 inch foam circular baking but won't these melt in the barrel and leave a sticky residue ?

I regularly use black foam to fill airspace in my loads shooting the long DR cases like the 470NE,backer rod used in construction is cheap & easy to cut to size,the rule of thumb to follow is to leave no airspace & a slight compression of the foam,you can read more about this in the Double Rifle section of AR,just use the find function.

I use pillow stuffing from Walmart in my Lott. Ear plugs work too, the foam ones.

quote:

Originally posted by canuck4570: I like the idea of 1/2 inch foam circular backing but won't these melt in the barrel and leave a sticky residue ?

Hold a match to one and see how it melts and burns up with very low residue.
I have noticed no worse fouling than regular powder fouling.
That is caulking backer foam rod, half-inch diameter for .458 WM.
0.3 grains of weight for one of those only 0.4" tall,
sliced from the long roll with a filet knife and cutting board.
Weighs next to nothing.
Cut them long or cut them short and stack them.
Use them compressed from barely so to squashed down to a half or quarter the original height.
No more Dacron fluff for me,
except for special effects snow showers.

after reading a lot on foam backing on accurate reloading this is what I am going tu use
my load now is 64 gr. of IMR3031 under my 550 gr. cast bullet at 2024 fps average
want around 1700 to 1900 fps will choose the most accurate loading
and I need about 1/4 to 1/2 inch tall wall to get to the bottom fo my bullet with different charge of 3031
I shot my rcbs 400 gr cast loaded to the bottom with imr3031 and got 1886 1886 1889 fps
very constant... so I wish to repeat with the 550
don't worry I will cut them long enough so they will be compressed about 1/4 of their length
thank you all for info
Canuck