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Another thing you might want to consider and control is primer seating. Seat them to just that point where you can feel them bottom out in pocket. Don't over seat and crush if possible. For 50 some use a hand priming seating tool so you can feel them seat.Hi everyone
Thank you very much for such detailed replies. I think the problem may have been such low powered loads used at the start that obturation failed and by the 16th shot leading had or was occurring. Secondly I have inconsistent cylinder throats ranging from .357 to .35575.
My friend and gunsmith has read all your comments and has decided to ream all throats to .357 and use .357 projectiles with 2.7 Vihtavouri 310 about the same or slightly faster than 2.8 Bullseye. All this into a .3545 barrel with a nice throat. I am also using various HBWC with a range of hardness.
Going to the range for some serious testing Thursday and Friday. Lets hope the weather holds. Well, after all, it is England
Hi TonyBest of luck Dave. It's summer there so all should be good, shouldn't it
Winter and 27 here, will just have to contend with blue skies. Range time for me this weekend too, need work at 50.
The swaged projectiles I have been using are 8BNH. Are these too soft. The others I use are hard cast. Any comments?First off from reading your post, assume you do not have a "machine rest". When testing loads like you are doing to really take the human error out of it & this is very valuable tool to have. Not having that, my humble opinion if you can opt for the 1:14 bbl. Stick with the .356 diameter bullet. 2.9 Vit 310 in my opinion little hot with a HBWC, but a hard cast bullet should work fine. Try dropping the charge to 2.6 and see what happens at the 50.
How deep are you seating the bullets? what crimp? Refer back to older posts from others for their suggestions. Make sure all the cyls ranges to bbl center bore when it locks up to fire. Do you have a range rod setup? With the 686 try some 158 grain SWC's too.
Big factor is quality of the bbl you have on the gun. I have had guns I thought should have shot great and didn't because the bbl was poor quality. Is it a first class air gauged bore with good lands and groves. Makes a difference for a competition gun. W
When you slugged it, did bullet go thru smoothly or "jump" especially at the area that screws into the frame?
Just some thoughts.