CB-4100-12B Wads
 

I am looking for a light recoil load for a sleeved Parker GH 12 gauge gun that won't put too much stress on the stock head and wrist area. I wanted to try loading some 7/8 oz loads according to the following Hodgdon recipe: Rem STS hulls, 19.8 gr Clays, CB-4100-12 wads, Win 209 primers, 6100 psi, 1250 fps. My PW "M" powder bushing throws 19.5 +/- 0.1 gr of Clays and the 7/8 oz shot bushing throws a hair less than 7/8 oz.

I already had the hulls, powder, and primers so I ordered the wads but was sent CB-4100-12B wads. I couldn't find a good explanation on what the difference between these two wads might be but I did not see any red flags. I was wondering if anyone on here has an opinion as to whether this is a safe substitution or not.

The "B" is only an addition to the nomenclature. The 4100 and the 4100B are the same wad. Good luck. Are you using a PW 375 or a progressive model?

IMR Handloader's Guid has scads of low pressure 700-X loads in all sorts of combinations. Same powder, wad, same weight as lead, it's a bismuth load, too. No fuss, no bother.

I have used 700x in the 10ga for several years, no issues. Carvel

As others have stated 4100-12 & 4100-12B are the same wad.
I've used this wad for at least 20 years now for 7/8 ounce loads.
Some of my most even patterns use this wad in a WAA hull,Winchester 209 primer, 18.5 grains of American Select powder at 1200 fps and 5600 psi.
The load is right out of the Alliant manual.

Ted I have been using 17.5 grains of Clay Dot with the CB4100 wad and win. 209 primer with 7/8 0z. of 7&1/2 for the last four years. Nice lite load and doesn't beat you up. I shoot twice a week 100 rounds each time.

Thanks for all the replies! I'll keep going with the Clays loads and also try some of the other suggestions.