Well just returned from the range I dunno if shooting from the seated bench made a difference or the one wrap of masking tape around the slug before putting them in the shot cups but all the slugs hit the boxes and two of them were rather decent all be it one powder for the right barrel and a different powder for the left barrel . I’ll just post the two I deem acceptable .

Thats not too bad. With double rifles if the bullet is to lite or to fast they will cross paths. If to heavy or to slow they will shoot apart. Look like you need a touch more speed.

Actually the top target is a pair from the right barrel and the lower target is a pair from the left barrel . Typically I like a slug in one barrel and buckshot in the other .

Have you looked at any of the molds accurate molds sells for slugs ?
They have quite a few hollow base designs too which I suppose is basically a foster style slug .

They have a .774 900gr hollow base design that looks pretty interesting , I think thats just a bit over 2 ounces .

The mold for the slugs I’m using was cut by Accurate as well as my .730” 730 grainer for the 10 gauge . Matter of fact the mold I borrowed a couple years ago and cast the slugs I shot today arrived in the mail today and is now part of my accumulation of stuff . I’ve put $250 in molds for this dinosaur that’s enough for now and besides I’ve met my parameters .

Oh yeah Accurate does not make HB or HP molds as such . They will cut the mold all the way thru on the bottom and you can send it to www.hollowpointmold.com and they’ll hook you up with the HB pin , which equates into $200+ by the time you’re done . For what I’ve got in the mold I’m using I’m perfectly satisfied and 730 grains is certainly heavy enough .

Have you tried any large lead shot in the 8 gauge ? I have always read that larger shot stacks more evenly in larger bores .

It’s very little difference when compared to a 10 . And no I’ve not tried large birdshot . Just 0 , 00 , 000 , 0000 and 00000 . And once the pair of .415” ball molds arrive I’ll make some 000000 buck .

I ordered some 0000 for the 10 ga BPS I had years ago but they never sent me the ammo . I want to try loading something for coyotes in the 10 gauge but I dont want to put anything too large through the Parkers since its full choked I have read that can be a problem ? But I think something like lead T shot or as Charlie said lead B or BB would be good coyote medicine . I dont have anywhere to try buckshot on deer . The area we have to hunt is mostly hogs and its wide and open , you're looking at about 300 yard shots .

I shoot 0000 and 00000 thru all my 10’s no problem . The largest I’ve ever heard of the factory loading for a 3 1/2” 10 was 00 .