redding body die, resizing

[dtrancrx]

hi guys,

Im trying to reload for my semi 308 and im using a redding body die to resize the brass due to it not fitting in a Wilson case gauge well (the lip of the shell stick out).

I was told that the body die should bump the shoulder back too, which is what i probably need to do since it not fitting in the gauge correct right?

so as im doing this i check my once fried brass in an rcbs mic and its readding one thousand over zero (.001).. so i run it though the redding body die using a Forster press.. i take the casing out and measure it again, now its reading .003 in the rcbs mic..and its still not fitting into the Wilson case gauge correctly..

what am i doing wrong? when bumping a shoulder back shouldn't my mic be reading the shell less than .001 since it was .001 before the resize?....please help..thanks..

 

[wilecoyote]

Re: redding body die, resizing

paint the shoulder with a black marker,and see if REALLY the shoulder show some contact with the corresponding part of the (properly setted ?)die_ use Imperial sizing wax,try again firmly and slowly ,allowing to the brass to set up himself inside the body die,to avoid any brass spring back_ if the body die,as any other full die,isn't properly setted,it will resize partially only,not touching the shoulder, and shrinking (not lowering) the most part of the brass:this side compression will cause the brass "grow"_

 

[MALLARD]

Re: redding body die, resizing

+1 wile coyote

try sizing more of the case

ha, that wilson gage. That is some anal shit. I dont even think benchrest shooters really use that tool. Maybe im wrong.

 

[dtrancrx]

Re: redding body die, resizing

it as low as itll go..i cant screw the die down any further

 

[wilecoyote]

Re: redding body die, resizing

what semiauto you have,and what's the brass brand ?

 

[shoot4fun]

Re: redding body die, resizing

The issue is probably not in the shoulder but in the base instead. I use a small base body die on brass from semi-autos.
Set the die up according to instructions. Raise the shell holder all the way up. Run the die in until if contacts the shell holder. Then lower the SH and turn the die down about another 1/8 to 1/4 turn. Now when you raise the SH to the die it should cam over on the die bottom.

 

[MitchAlsup]

Re: redding body die, resizing

You have run into the "Twilight Zone" a place wher one shortens things and they become longer!

As the die squeezes the body raidally, the brass has 2 choices, it can return to where it originally was or it can go somewhere else. Murphy's law says it will go somewhere else. Snce the radial dimension is fixed, the brass expands in the longitudinal direction.

Only if the case encounters the shoulder inside the die, will the case's shoulder be pushed back. But even here the brass is flowing longitudinally across the shoulder and into the neck.

It is just the way it goes.

 

[FLIGHT762]

Re: redding body die, resizing

Those Wilson style drop in case gauges will not properly read a case if the rim has been tweaked. That could be one of your issues. Semi autos beat up rims.


I have the Dillon drop in gauges (just like the Wilson), but I switched over to the Sinclair bump gauges. They read the shoulder bump better and you don't have to worry about the bent rim issue. The Wilson gauges are a basic gauge, but for what you pay for one, you can buy the Hornady or Sinclair set, which will measure a full array of calibers. I prefer the Sinclair since their gauge is made of steel, but the Hornady gauge works well.

Take a few cases that have been shot in your rifle. Run them through the Redding body die (my Redding 308 Win. body die bumps back to near SAAMI minimum) and load up a few dummy rounds (bullet with no powder or primer) and see if they will easily chamber and eject out of your rifle. If they do, you're done.

 

[dtrancrx]

Re: redding body die, resizing

its for an ar10, dpms sass barrel, the brass is just pick up brass taht i shout once out of, there federal..

 

[dtrancrx]

Re: redding body die, resizing

i will give that a try flight762

 

[wilecoyote]

Re: redding body die, resizing

I strongly agree about buyin'the Sinclair bump gauge and at least a .308 "GO"+"NO GO" gauges,and learning their use_ Said that,for several causes,not all the ejected brass from shooting a semiauto will have the same dimension_some of them,if untouched,can fit their chamber again,others don't will fit_the risks related to some wrong try to uniform them will be related to misfires, head separation, chambering failures, slamfire_ the first savvy thing is understand the actual chamber headspace dimension and tolerances of my s/a rifle thanks to the ITEMS ABOVE,not thank to other commercial gizmos_ as said above,above the rim can happen some enlarging with consequent resizing problems_I'm against forcing or overcamming the press_sometime problems are encountered with commonly available full,body only,small base dies,etc.,or plainly they not readily available_ The excessive bulging near the base can be reduced lowering the height of a shellholder, sanding his upper face with oiled fine abrasive paper placed on a flat surface(i.e.glass),if a lathe isn't available_a more radical cure is cutting a Lee fl die under the level of his lower shoulder angle,obtaining a ugly dwarf die born to be screwed to the press from the inside of the same press UP (the usual dies goes from the outside DOWN in the press)His hex ring,placed on the upper part of this die,will contact the inner face of the press,of course_ coupled with the lowered shellholder,I can obtain a significative radial shrinking,if needed_(Imperial sizing wax mandatory)_Now I have a case radially reduced as I need,and squeezed too much in lenght/headpace,because until now the shoulder has been untouched,and the radially only squeezed brass has migrated up_ I will now set my desired shoulder lenght/headspace thank to a body only_ hope can help

 

[Fuzzball]

Re: redding body die, resizing

"..it as low as itll go..i cant screw the die down any further.."

I doubt that. IF I understand you correctly, you need to screw that sizer down at least .004" more; that's about 1/16 of a turn. Place a case in your shell holder and push it as far up as it will go; look under the die and see if you don't have a small gap of daylight showing between the die and shell holder. If so, turn the die down until that gap disappears.

A SAAMI cartridge tolerance (drop-in) gage only tells us if the loaded ammo will fit into any rig ever chambered for that cartridge, it won't tell us a thing about how well our ammo actually fits OUR specific rig. That's what the RCBS Precision Case Mic does and it says your resized shoulders are too far forward by 4 thou.

GO and NO-GO headspace gages are for gunsmiths who do rebarreling and chambering work. Like the drop-in case gages, they only tell us if a chamber is within tolerance, they can't tell us what the <span style="font-style: italic">actual</span> headspace is nor does that greatly matter to a good reloader anyway. We can - and should - learn to make our ammo fit our own chambers so even if we have 'excess headspace' our reloaded ammo will fit perfectly.

 

[KNIGHT11B4]

Re: redding body die, resizing

I had to grind down the bottom of my redding die. Wouldn't bump the shoulder of my 260 brass.

Shaved a bit off and works great. Using a Forster Co Ax

 

[littlerascal56]

Re: redding body die, resizing

I agree..when I had my Co-Ax, I had to grind .004 off a couple of my sizing dies to get the brass sized to spec.