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Jeff Elder
11-06-2019, 08:35 PM
Will A over shot card change the barrel pressure?

John Dallas
11-06-2019, 08:59 PM
All other things being equal, I would think the pressures would be minimally higher due to the increased mass of the card

edgarspencer
11-07-2019, 07:32 AM
According to Precision, my roll crimped paper shells, with overshot card, were consistently lower than my same charged, folded crimp shells.
An overshot card, used as a filler, atop the shot, then fold crimped, may be infinitesimally higher than without the card. ( A bag of 500 over-shot cards might weigh a few ounces.)

Buddy Harrison
02-08-2020, 10:14 PM
If you're really concerned, do as I do. Subtract an amount of shot equal to the weight of the card wad and you're good to go.

wayne goerres
02-08-2020, 10:24 PM
Use it. You will never know the difference pressure wise.

Rick Losey
02-09-2020, 09:06 AM
take out one piece of shot and you will likely balance it

but - why are you adding the card? poor crimp?

i use these over buffered loads to keep the fine powder from leaking out which sometimes happens even with a good crimp ( i have opened flats of factory buffered shells and found some buffer powder has come out)

https://www.precisionreloading.com/cart.php#!l=PRP&i=TS12

they are so thin I find I often have two or even three picked out together - and they are very flexible so there should be no affect on the pattern

Buddy Harrison
02-09-2020, 09:18 AM
I use different thicknesses of wads, mostly .125 (sometimes more than one) to help get a perfect crimp.

Buddy Harrison
02-09-2020, 09:21 AM
Of course I always place the wads in the bottom of the shot cup before I add the shot. Duhhh:

Harry Collins
02-09-2020, 10:46 AM
Buddy,

Many of us that reload 10 gauge with 1 1/8 or even 1 1/4 oz of shot place various shot cards in the bottom on an SP 10 plastic wad to accomplish the same thing you are. I'm shooting these 10 gauge shells in an 1881 Lifter Parker with Twist Steel barrels with impunity (so far). I would not worry about it.

Harry

edgarspencer
02-09-2020, 04:36 PM
I’m having a hard time believing Buddy was serious. One overshot card weighs about the same as two or three #8 pellets. Most presses drop far more pellets deviation. Run 10 drops. Weigh them. The deviation will make an overshot card seem light compared to the tiniest fart.

CraigThompson
02-09-2020, 04:43 PM
In my 10 gauge 1 1/4 and 1 1/8 ounce loads I use a folded crimp I ALSO put an overshot card on top the shot to help and keep my crimps as flat as possible . I HATE pulling a shell out with a concave crimp . It also cuts down on needing candle wax to close any wee shot seeping holes in the middle of the crimp star .

charlie cleveland
02-09-2020, 05:33 PM
i roll crimp my losds so you gota use a overshot card to keep the shot from falling out....charlie

charlie cleveland
02-09-2020, 05:45 PM
i just reread my post it was one of them DUH....MOMENTS