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Post by ET on Jan 26, 2021 16:47:34 GMT -5
Being bored I felt I had to explore a way to reform a sabot for a better fit. This involves the 40/50 sabot. To get a 40cal bullet to seat properly the inner dimension of the 40/50 needs to be altered so that the base of the bullet can bottom in the sabot without a lot of effort. Did a little reconnaissance around my work area and felt I had enough materials to give it a go.  My first attempt was not too shabby but needs more adjustment to my technique. This experiment isn’t really practical for others but helps occupy an active mind that’s bored, chuckle. As for the end result, I’ll learn if my thoughts are on the right or on the wrong track headed for derailment at a dead end. It should be an interesting ride to discover what track I’m on, chuckle. |
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Post by hunter on Jan 26, 2021 18:39:53 GMT -5
It makes sense that the better fit on the right should shoot better and the sabot should hold up better. I assume you took the rounded edge out of the bottom of sabot to get his fit
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Post by ET on Jan 26, 2021 20:59:31 GMT -5
It makes sense that the better fit on the right should shoot better and the sabot should hold up better. I assume you took the rounded edge out of the bottom of sabot to get his fit You could say I took out the rounded edge by displacement with a heated die tip. I guess I should include a picture of my setup. I machined a tip (.400") that gets heated around 225F-250F and is forced down into the sabot. Using a drill press I can control the depth of insertion. Once the die is firmly seated into the sabot I then apply force from the collect die to keep a specific diameter to the sabot. The amount of movement from the collect is also preset. Before I forget there is an insert in the sizer that stops the sabot at a certain depth.  It has been a fun project so far and hope it proves to be worthwhile. |
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Post by ET on Jan 27, 2021 15:23:50 GMT -5
Brief Update Okay I feel I have improved my reforming technique and time to move to phase-2.  Now it's time too see how much knurl I need on the bullet for the desired load resistance. Chore for another boring day. |
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Post by jims on Jan 27, 2021 19:45:26 GMT -5
I hope you can get them to shoot accurately. I never had much success with the 50/40 combination.
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Post by ET on Jan 27, 2021 21:48:35 GMT -5
I hope you can get them to shoot accurately. I never had much success with the 50/40 combination. Jims I hope I can get them to shoot decent. I have a gnawing suspicion that the bullet to sabot fit is creating problems for bullet seating and alignment to bore. With this dimensional adjustment I also have a little room to add a knurl to the bullet to ensure a proper spin. Now I have two what appear to be viable methods to try and get a 40cal bullet to shoot out of a 50. If one method proves to work really well I'll do a happy dance at the range, chuckle. |
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