Wadding??

Boolit Bub Join DateDec 2012Posts23

Well, I've cast a bunch of boolits with my new mold for my '09 Argentine Mauser. Good mold, throws them right at .312. Looking in the Lyman Cast Bullet handbook, they recommend about 14grs, max, of Unique, giving a MV of around 1700fps with a 160gr boolit. In spite of seeming light, I'll follow that lead. My question is, this case is supposed to be loaded with +/- 39gr of 4895 with a J boolit. Won't 15grs of Unique be kinda spread out in there? Would it be advisable to use a paper tissue wad over the powder charge to keep it up next to the primer? Thanks for any advise.

Read the notes. Where REQUIRED, the notes will show the use of a bit of dacron as a locator. If it is not suggested, it is not needed. Stuffing TP in the case could result in dangerously high pressures as it does not flow.

"When all else fails, follow the instructions."

Boolit Bub Join DateDec 2012Posts23

Read the notes. Where REQUIRED, the notes will show the use of a bit of dacron as a locator. If it is not suggested, it is not needed. Stuffing TP in the case could result in dangerously high pressures as it does not flow.

"When all else fails, follow the instructions."

Must have missed that, obviously. Used to be an upholsterer, and used dacron as a cushion filler. Packed real good, but, never thought about it 'flowing'. Thanks for the correction.

Must have missed that, obviously. Used to be an upholsterer, and used dacron as a cushion filler. Packed real good, but, never thought about it 'flowing'. Thanks for the correction.Nope, not a correction, just a response to a request. That's good, shows you're thinkin'. We'd much rather you ask "What will happen?" than "Why DID it happen?" Know what ah' mean, Vern?

You're doin' good, keep at it. Read all you can and think it through. 'Plan your work and work your plan'.

So, I've always wondered if the same tuft from a cotton ball would work as well as dacron without pressure problems. Or does cotton tend to pack too good?

Not that it might matter to anyone accept me but for 20 or more years I have been using packing popcorn as a filler. I used dacron before that but I like the PP better.

Every shot you get in life counts

there is a sticky, here http://castboolits.gunloads.com/forumdisplay.php?45-CB-Loads-Your-Favorite-Cartridge
on the proper use of fillers.
I point it out because you mentioned how well dacron packs, you don't want to do that.

Boolit Bub Join DateDec 2012Posts23

Thanks, Everyone for the advice. The sticky was especially helpful. I am still puzzled by the Lyman Manual's load data for the Argentine Cartridge. The 7.65x53 case is approximately the same size as the .308, but, Lyman limits the loads to around 14-15grs of Reddot, Herco, Unique, and others. Of course, they were using a '91 Mauser as the test bed, and apparently wanted to keep the pressures down for the old gun. Mine is a Model 1909, a '98 action. Anyway, 15grs of Unique is not much for that case, lots of empty space. That's why I asked about the wadding. IN THE MEANTIME, I slugged the bore of my 1909, and find it is as advertised. .303/.313, so my .312 cast slugs are too small, unless I paper patch them. My mold throws two different size slugs, .312 & .317. Guess I'll have to use the .317. Now to get a sizer in that number. Guess I need to slug the project barrel as well to see if those .317 slugs will work for that, it's an 8.15x46. They may be too small for it. The more I learn, the more I see that I need to learn. (and I one of those kids who wants to do it NOW!) thanks, Guys.

Mikeym1a,
Get yourself a Lyman Cast Bullet Handbook, the new 4 th Edition, it shows loads that fill the case more with powders like 2400, SR-4759, IMR-4227, 5744 , IMR-4198, N133 and RX7. These are slower powders thus you can use a bit more to help fill the case. Fillers are not allways necessary, powders like Red Dot are not position sensitive. I try not to use them cause its a Pain in the rear to get the right amount precisely in place. I shoot at the range and just tip the barrel up a little before firing to place the powder towards the primer. I would rather do this than fiddle with dacron , toilet paper and what have you.
None of the cast boolit loads in the 4th edition, for the 7.65 Argentine Mauser, call for the use of a filler so I
would not use one. They do say to slug your bore as dimensions do vary.
And slow down, reloading has a bit of a learning curve to it and the reloading Gods do not treat the foolish kindly. Use published data and don't try second guessing powder charges and burning rates. Reload safe .
Gary
By the way, what boolit mould are you casting with and at what diameters do they drop ?

Last edited by gwpercle; Today at 04:33 PM. Reason: ask question

Boolit Bub Join DateDec 2012Posts23

Mikeym1a,
They do say to slug your bore as dimensions do vary.
And slow down, reloading has a bit of a learning curve to it and the reloading Gods do not treat the foolish kindly. Use published data and don't try second guessing powder charges and burning rates. Reload safe .
Gary
By the way, what boolit mould are you casting with and at what diameters do they drop ?I using the Lee mould for the 7.62x39, CTL312-160-2R. That was the closest I could come to the .313 of the Argentine. It almost does. One cavity throws a .312/313, and the other throws .316/.317. From what I've been reading, you want a couple thou over for a good fit. Just trying to figure out what I need next. Spring is around the corner, and I'm getting antsy. Guess it's that time of year....

I found that generally whatever size bullet will just slip fit into a fired case id a good starting point for bullet size .

Jack

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Abbreviations used in Reloading
Pointed Soft Point "Core Lokt"

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