Hopefully an Entertaining Read

[ET]

I’m kind of put on hold for my powder burn testing with the 50 so my attention has shifted to another area I will eventually explore.
For some reason I have found an interest in the duplex sabot concept that I still want to explore.
Originally in the past, I trimmed the bottom of the 45-blue sabot for a flat fit to the outer sabot. My hope was to glue both sabots together but then found out there is no adhesive that would accomplish this. NUTS.
I tried it anyway even with a few variations but I could not get stable flight.

Now that I’m re-examining my past testing, I’ve come up with a few additional thoughts. For flight instability I suspect the inner sabot is shifting during bore travel. First, I need to increase the load tightness (load resistance) to try and prevent inner sabot movement. This may not be enough so an additional sandpaper disc (glued back to back) may help this condition. I may not be able to glue the sabots together but can add a sandpaper disc between the sabots to help resist movement.



Whether this experiment succeeds or fails there is always something to learn from it. One lesson for punch outs is to use a hardwood backer board, chuckle.

[biged57]

Interesting let us know how it works out

[sw]

Ed,
I’m aware that you are interested in stretching out the possibilities of the 10 ML2/50 cal. Resizing some of the advanced, higher BC’d 40 cal bullets (40 cal Furys, Pittmans, others) from 402 to 400-4005 (adjustable smooth sizing die or 400 Lee fixed sizing die - ~$25) might be of interest.

Another consideration is the Dead Center bullets of Cecil Epps. I had significant success with two of these: the dual saboted 195g 357 /45/50 and the single sabot 240g 40 cal bullet. These truly do have high BCs. Book loads will not work! I’ve forgotten the exact loads I used but loads using 2015 worked extremely well. They can be shot to 2600+’/sec with extreme accuracy! But, a slower acceleration is mandatory. My loads were straight 2015 and duplexes of 4759/2015 (5-6g/50+gs).

If these bullets are shot with the faster powder book loads, they just don’t fare well.

Have fun stretching the 50 cal out.

[ET]

SW

Thank you for your response. This is an independent journey for testing I need to explore. Will past rules apply, I don’t know but want to find out first hand. My 10ML-II won’t be sitting idle in 2020.

Ed

[billc]

Ed.
I can't wait to see the results of your 2020 (and beyond!) testing! You have many fantastic ideas to explore.
Bill

[ET]

Dec 25, 2019 17:16:23 GMT -5 billc said:

Ed.
I can't wait to see the results of your 2020 (and beyond!) testing! You have many fantastic ideas to explore.
Bill

Thank you for the kind comment. Ideas and theories I have but now need to produce results to verify what ideas are good or bad. Others like yourself have helped me sort out some equipment so now I feel the need to produce data results. For myself I hope to put together some efficient and consistently accurate loads with other powders for the 50 now that 4759 is gone. The 50 has lost its day of popularity but definitely not its usefulness.