well i got the left barrel rechambered...every thing stayed within spec s....in fact it has more chamber thichness than a single barrel 3 1/2 inch h r single barrel i own... i proofed the gun by tying a string on the trigger and getting behind the corner of my shed...i fired it 3 times with no problems...gonna try it a few more times and see how it patterns on paper... i had already glassed the stock but may have to pin the stock also for its sure gonna kick...have a slip onrecoil reducers on it now was bearable with 3 inch shells but its gonna be a hand ful may have to lead the stock....if this thing kicks harder than this h r single barrel ive got i may have to buy me a 410... charlie

shot the gun 15 more times from the shoulder this afternoon...gun is manage able with the 3 1/2 inch loads...but kicks pretty good...i fired 5 3 1/2 in and 10 3 inch shells...gun paterened with no 5 shot in both lenths of shells irs shooting at least a 85 percent patern with the 3 1/2 inch and shooting about the same pattern with the 3 inch...now all i got to do is get theright side barrel finished and checked out...ps forgot to mention i counter bored the gun 2 inches ...... charlie

reloaded up several 3 1/2 inch shells....reloading book said to use 41 grains of bluedot with 2 ounce of shot.... pressure 11000 psi....they pattered well and did not kick as bad as the factory ammo...this should be a fine rainy day gun for turkeys...i slipped on one of those new arm saver pads its worth the money... charlie

Mr
Charlie if you need to sell your parker 8ga to fund your 12ga research let me know Hahaha.
Oh talking about boomers i havr a box of 3.5" 10ga loads 3oz! Payload in a 10bore.
7.75$ per shell someone gave me the 5rd box

milt thanks for the offer to fund my 12 ga research.... i too wanted a 3 ounce load im the magnum 10...destrey hoffard fonf me the site info for the company that loads these3 ounce loads....i know they were well over a hundred dollars abox of 25...i did not buy them but i did load up 3 ounces of shot in the magnum shell....i did not have a chronograph to test speed but i could tell by the way the 5 gallon bucket i was using for a target did not rock and roll like a 2 1/4 ounce load did to it...i read the factory speed for the 3 ounce load and it was pretty slow compared to the speed of the 2 1/4 ounce loads...plus the patterning suffered with the 3 ounce load and penatration is not real good....plus recoil is very heavy using the 3 ounce load..i was shooting my loads in a ithaca mag ten in other words a automatic ten..if this load had been shot in a magnum ten double it would be a handful... so in my opinion the 3 ounce load is too much for the ten...it could be made with more powder and get the speed up but would build very high pressures and would be a unbearable load to shoot...even in a auto...would be too much for the shoulder....only way to solve the hard kick would be to build a a heavier frame ten of about at least 13 pounds...when your shooting a 3 ounce load you are really shooting a lite load for a four bore...and you aint got the weight of the 4 in a ten...unless youve got one of them really heavy tens some of the boys got here... charlie

Might as well get a 8ga then lol. My 4ga muzzleoader single barrel english fowler with a conversion style percussion lock will cost 1750$ complete and 120 day build time. I was told by aa guy with a blunder buss that 5oz @1100 fps inst bad in his 8lb gun because black powder make a smooth recoil motion .
hope mine will be in the 15-20lb range. Might try a 4oz load to. I want to make paper cartridge for it.