Ferretlurcher1970 Posted April 16, 2022 Report Share Posted April 16, 2022 Does any one have the sizes in inches or mm for 8 bore chokes Quote Link to comment Share on other sites More sharing options...
guy baxendale Posted April 25, 2022 Report Share Posted April 25, 2022 My double 8 is: .782 and .784 Quote Link to comment Share on other sites More sharing options...
Stonepark Posted April 25, 2022 Report Share Posted April 25, 2022 Due to the differing bore size in 8b's, you really need to get the bore and choke measured to work out the constriction if you are looking for an empirical choke measurement in thousandths of an inch. Emperically for a true 8 bore (0.835inch), imperial measurements at choke should be approximately Cyl 0.835 1\4 0.824 1\2 0.812 3\4 0.806 Full 0.789 XFull 0.784 Otherwise for your preferred loading count the pellets in a cartridge and then fire it at a 40yards, and count the pellets in a 30" circle to work out the percentage choke which gives the most reliable and accurate measurement. Quote Link to comment Share on other sites More sharing options...
Ferretlurcher1970 Posted April 25, 2022 Author Report Share Posted April 25, 2022 Hello stone park Bore is 00.838" Choke is .8017" So would you say 1/2 to 3/4 ? Quote Link to comment Share on other sites More sharing options...
Stonepark Posted April 25, 2022 Report Share Posted April 25, 2022 27 minutes ago, Ferretlurcher1970 said: Hello stone park Bore is 00.838" Choke is .8017" So would you say 1/2 to 3/4 ? For a true 0.835inch 8 Bore, 3/4 choke would be about a 6.8% constriction, and 7/8 (light Full) choke a 9.4% constriction. 0.8017 on a 0.838 bore is a 8.5% constriction, which would suggest something along the lines of 13/16, sitting between 3/4 and Light full. I would be expecting (assuming shot was good quality and cartridge well balanced), at least 65% patterns with lead and 70%+ with steel or heavy shot. As mentioned above, patterning it 40 yards and counting pellets in a 30 inch circle and comparing to number in an unfired cartridge is the only way to be certain. % Pellets in 30 inch circle at 40 yards: - Cylinder 40% Improved Cylinder 50% Quarter 55% Half 60% Three-quarters 65% Full 70% Guys gun above appears to be effectively choked XFull, XFull, which is also not uncommon on dedicated wildfowling guns. Quote Link to comment Share on other sites More sharing options...
Ferretlurcher1970 Posted April 25, 2022 Author Report Share Posted April 25, 2022 Need to get testing. Have made up some bb bismuth. Quote Link to comment Share on other sites More sharing options...
Smokersmith Posted May 13, 2022 Report Share Posted May 13, 2022 On 25/04/2022 at 22:41, Ferretlurcher1970 said: Need to get testing. Have made up some bb bismuth. Buffering will help if you want to tighten it up a bit more. Quote Link to comment Share on other sites More sharing options...
Ferretlurcher1970 Posted May 13, 2022 Author Report Share Posted May 13, 2022 As I am using card wads, is there a non plastic buffer you can use? Do you put the buffer in with the shot or layer of shot then get the buffer between the shot ? Quote Link to comment Share on other sites More sharing options...
Smokersmith Posted May 13, 2022 Report Share Posted May 13, 2022 The buffer is usually tipped in after the shot is added ... I use an electric toothbrush to help it settle into the voids, but with BB's it should flow down well. On the 'non-plastic' ... that's an area that needs more work I think. I know one thread on here where ground coffee was suggested as an option. Quote Link to comment Share on other sites More sharing options...
Ferretlurcher1970 Posted May 13, 2022 Author Report Share Posted May 13, 2022 That's interesting. Was thinking split rice but not sure on life span Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.