Hello GJinNY I would prefer slower powders like SR4759, Steel, Blue Dot, HS-7, Longshot, SR4756, HS-6 and Lilgun but since you already have bought Clays be sure to use thicker darker nitro cards from BPI right on top of your OP wad to create a solid barrier to keep out the burning gases from getting to the BLS 12. I had bought those from BPI 12 gauge.170 darker nitro cards. See if you can use two to help further. Use BP GS-2 instead of X12X. If you use FS12 OP wad then you might not have enough room to put two .170 nitro cards so stick with GS 2 OP wads. GJinNY please cut the little central post with a smaller screw driver in your sabots.
Here's the load # 81022-188
BLS 12 with .50 cal. 350 gr Hornady HP-XTP, Fiocchi 2 3/4 hull, Fio. 616, 23 grs of H.Clays, Wad FS 12 flex seal, BLS 12, roll crimp, 1750 fps, 10,100 psi.
( If you cut the cushion part of BLS 12 then use GS2 on top of your powder followed by a 12 gauge .170 darker nitro card now put another GS2 and the BLS 12 shot cup only with the bullet should fit.)
The sabot arms ( petals ) bend them back flat on a table so that they are sure to open rapidly and release the bullet. You might have to put a .410 card in the BLS 12 to raise your bullet so the nips or the tits can grab on the bullet and lock it in, if the bullet moves then it will very easily punch into the bottom of the BLS 12 upon ignition and launch! You want the BLS to hold the bullet in place guaranteeing maximum imparting of the spin from the rifling to increase accuracy.Since I cast my own bullets I use Lee C501-440-RF and it weigh about 445 to 450 grs when cast of WW. I water quench them to harden. Its a 2 cavity mould for $19 from Midsouth or Midway and the bullet fits just right into the BLS 12.
Here's more loading data:
BPI Guide: BLS-12
ID# Ref# Ga. Len. Hull Primer Powder Gr. Gas Seal/Wad Over Shot SLUG MFG
Type PSI FPS Crimp
80929 79 12 2.75 FIOCCHI FIO-616 CLAYS 24.0 X12X+BLS12 COS12 300GR Hornady
HP-XTP 10200 2200 ROLL
81001 110 12 2.75 FIOCCHI FIO-616 CLAYS 24.5 X12X+BLS12 COS12 300GR
Hornady HP-XTP 11500 2400 ROLL
81006 128 12 2.75 FIOCCHI FIO-616 E3 22.0 X12X+BLS12 COS12 300GR Hornady
HP-XTP 11400 2450 ROLL
80929 81 12 2.75 FIOCCHI FIO-616 CLAYS 23.0 X12X+BLS12 COS12 350GR Hornady
HP-XTP 10900 2100 ROLL
81006 127 12 2.75 FIOCCHI FIO-616 E3 20.0 X12X+BLS12 COS12 350GR Hornady
HP-XTP 11200 2350 ROLL
81001 112 12 2.75 FIOCCHI FIO-616 LONGSHOT 33.0 X12X+BLS12 COS12 500GR
Hornady JFP MAG 10400 2600 ROLL
81002 114 12 2.75 FIOCCHI FIO-616 LONGSHOT 35.0 X12X+BLS12 COS12 500GR
Hornady JFP MAG 11200 2650 ROLL
80929 82 12 3.00 FIOCCHI FIO-616 CLAYS 26.0 FS12+BLS12 COS12 350GR Hornady
HP-XTP 10200 1700 ROLL
81002 116 12 3.00 FIOCCHI FIO-616 CLAYS 28.0 FS12+BLS12 COS12 350GR
Hornady HP-XTP 11400 2100 ROLL
81003 123 12 3.00 FIOCCHI FIO-616 INTERNATIONAL 30.0 FS12+BLS12 COS12
350GR Hornady HP-XTP 11000 2200 ROLL
81003 122 12 3.00 FIOCCHI FIO-616 E3 24.0 FS12+BLS12 COS12 350GR Hornady
HP-XTP 11200 2150 ROLL
81006 129 12 3.00 FIOCCHI FIO-616 HS6 44.0 FS12+BLS12 COS12 500GR Hornady
JFP MAG 11100 2400 ROLL
81006 130 12 3.00 FIOCCHI FIO-616 LONGSHOT 38.0 FS12+BLS12 COS12 500GR
Hornady JFP MAG 9700 2350 ROLL
80929 117 12 3.50 FEDERAL FED209A CLAYS 28.0 (2)FS12+BLS12 COS12 300GR
Hornady HP-XTP 14000 2200 ROLL
81006 133 12 3.50 FEDERAL FED209A E3 27.0 X12X+FS12+14CORK12+BLS12 COS12
300GR Hornady HP-XTP 11200 1600 ROLL
80929 83A 12 3.50 FEDERAL FED209A INTERNATIONAL 34.0 (2)FS12+BLS12 COS12
350GR Hornady HP-XTP 13600 2600 ROLL
80929 83B 12 3.50 FEDERAL FED209A INTERNATIONAL 32.0 X12X+FS12+BLS12 COS12
350GR Hornady HP-XTP 13500 2800 ROLL
81003 125 12 3.50 FEDERAL FED209A HS6 46.0 (2)FS12+BLS12 COS12 500GR
Hornady JFP MAG 11700 2400 ROLL
81006 133 12 3.50 FEDERAL FED209A HS6 50.0 (2)BPGS+FS12+14CORK12 COS12
500GR Hornady JFP MAG 12900 2750 ROLL
81002 118 12 3.50 FEDERAL FED209A LONGSHOT 40.0 (2)FS12+BLS12 COS12 500GR
Hornady JFP MAG 10600 2350 ROLL
81003 124 12 3.50 FEDERAL FED209A LONGSHOT 42.0 (2)FS12+BLS12 COS12 500GR
Hornady JFP MAG 11600 2450 ROLL
81006 131 12 3.50 FEDERAL FED209A LONGSHOT 44.0 BPGS+(2)FS12+BLS12 COS12
500GR Hornady JFP MAG 11400 2400 ROLL
81006 132 12 3.50 FEDERAL FED209A LONGSHOT 46.0 (2)BPGS+FS12+14CORK12
(2)COS12 500GR Hornady JFP MAG 12500 2550 ROLL
BLS-12 SLUG
*Roll Crimps: This is a rigid load requirement at this time.
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WHERE DATA LIST SPECIFIC COMPONENTS, NO CHANGES OR SUBSTITUTIONS FOR THESE
The little central post directly below the wad and in between the cushion has been removed in these newer BLS 12 Sabots that are now blue and were black a few months back thats when they ran a high speed film test to see what was going wrong! The gas seal part has changed some what and the OD of the sabot will fit the rifling much tighter.
I had a long talk with BPI today asking them to release the sabots in time for this hunting season but they are still hesitating to release them as they are still testing them. They do not want to take any chances and only release them when they are satisfied it will perform the way it should.
I am sorry for getting you excited. I know, I'm an old clunker.
Ajay Madan
http://www.PreciousVideoMemories.Com