Greetings, the weather was nice and cloudy, at the range we were getting 1702 fps with a 450 gr slug in sabot, no sign of over pressure
I am rally starting to like 6 point fold crimp, consistancy
in the crimp for better cumbustion is very important, the bullets must be seated all the way
at the base.
The 391 grain bullet that I really like in sabot gave 1705 fps
this bullet mold was modefied from a 450 gr mold, for some reason it was not locked-in
well so it jumped at launch and as it hit the free bore, it dug 1/4 inch into the base of the sabot
yet giving 1705 fps, I need to try a lighter bullet for faster velocity!
I was hoping to do all my test from 24 inch barrel but all I have now are 22 inch barrels for testing
so these velocities are from 22 inch rifled barrels!
The Federal hulls with Fed. 209A magnum primers were used and no pressure signs, what so ever
were visible, in the past we had extraction issues, extractor marks from Fiocchi hulls!
To protect our chronograph from flying sabots and nitro cards, we use wooden dowels instead of metal rods!
Its a good idea to use good quality hull for testing, once your testing is done then you can switch over to cheaper hulls!
I keep forgetting to mention that we have been playing with the Lyman 525 slug in wad on the side and have so far
got 1562 fps with 2 3/4 Fed hull, Fed 209, 45 gr of A. Steel, Fed.12S-4 with a .125 inch nitro card of 16 gauge right below the slug
and put some wad pressure, for a perfect 6 point fold crimp, now we all know the wad has a powder seeping problem so cut a 1 inch
square from any photo copy paper and push it down the throat on top of the powder with a .626" wooden dowel before you put the wad etc.
We got 1574 fps with 3" Fiocchi, Fio 616, 40 gr of A. Steel with 1 inch paper on top of the powder followed by Fed.12S-3 purple wad with a .125 nitro card of 16 gauge
put some wad pressure followed by a roll crimp, until it touches the slug!
Now do not underestimate these loads as they are very deadly and powerful!
Please use the above loads at your own risk!
More testing yet to be done as the 20 ga gun and loader is on the way!
Ajay
VdoMemories-Blazing Sabots