Over shot cards/wads on the top of shot.

[Richie10]

Do putting over shot cards or felt wads under the crimp affect pattern?

 

I have done this previously to make a tighter crimp, but would this affect the pattern?

 

Thanks

[subsonicnat]

Short Answer NO.

[wigeon jim]

As said above, you will find the card only a few yards from the end of the barrel after firing as it slips off the front of the shot load, Jim.

[kenholland]

found the cards gave me a better crimp, had to get them from clay and game anybody know where to get 12bore reloading in the west midlands i'm Oldbury based thank's

[dipper]

Why don't you get a 3/4 inch punch and make your own useing polystyrene food trays. Dipper.

[kenholland]

worth a try thank's.

[longgun]

Do putting over shot cards or felt wads under the crimp affect pattern?

 

 

Sometimes yes, sometimes no. Random.

[Lord Geordie]

I use cardboard cut out of cereal boxes "true blue peter style" for raising the stacks now and then! Never needed to use an over shot card, as all my recipes are crimps! Never noticed a deviation in pattern from beneath!

 

As for the punches! They can be found extremely cheap! I bought a pair of the bay for around £5 delivered a few year back! Then inherited a couple more, which I believe are 20g

[sitsinhedges]

Any filler cards should always be under the shot but you can put a thin paper disc on top which will stop the shot migrating into the crimp folds so easily but still have some give and so generally produce a better crimp.

[dipper]

I always put disk in shot cup after seating plaswad it takes more time.if you put it in before you can get disk sticking in drop tube. Dipper.

[TONY R]

Ido RTO loads in the traditional sense but i NEVER put a card under a fold crimp, my thoughts on this are that it has the potential to increase pressures.

The typical RTO load allows the card to flex on discharge and as such open more reliably, where as a card under a fold crimp is pretty well supported by the folds, and on discharge the card will be forcing the fold open with more pressure on the case up close to the roll edge of the fold and end of the side wall rather than opening as normal.

This i doubt is going to increase pressures enough all by its self to constitute a danger however it could be a contributing factor to a significant problem if allied to other factors. I have never tested my feelings on this in the pressure gun but i might do just to satisfy my curiosity at some point.

I must say this here, there seems a trend appeared recently to fiddling about with crimp closures after crimping running a RTO over a folded crimp cards under crimps etc, as i said earlier by its self its perhaps not a threat but if coupled to other factors could be a problem,, and i don’t feel its of any advantage or necessary.

Edited September 26, 2016 by TONY R

[motty]

I often put card, felt or fibre over shot in some loads. It helps with crimping and helps keep buffer in.

[Walker570]

The factory/s don't do it so why should we. I think I agree with TonyR it might just up the pressures a bit. I have only just returned to reloading after a break of close to 40yrs and having to re learn the techniques, but if the powder/shot column is the correct length then the crimp should be spot on. My 375PW press back in the 70s made a superb finish but it may be just the 410 shells, I don't know, but the Mec just doesn't round off the finish quite the same and I may go to running a spinner over them. I'll see how they perform on the ducks this weekend.

[Feltwad]

When using feltwads or klenna wads the loading procedure should be powder, 1/8 card, feltwad or klenna wad, 1/8 card , shot , 1/16 over shot wad for a rolled turn over, but not for a crimp.. When using a klenna wad this can be cut down to obtain the right size wading but most important there must be a card wad between the felt or klenna and the shot. If this wad is omitted the force of the ignition embodys the shot into the felt or klenna wad and leaves the barrel like a bullet and it also blows the pattern

Feltwad