Any body got a specific alloy they use for 45acp and 9mm hollow points to get good expansion
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Any body got a specific alloy they use for 45acp and 9mm hollow points to get good expansion
Use 1:40 tin-lead in revolvers below 900 fps. Use 1:30 above 900 fps to 1200 fps. Use 1:20 above 1200 fps. Soft alloys needed for reliable expansion can be problematic for feeding in autopistols. Pb-Sb-Sn alloys of proper hardness will work well in autopistols, but if Sb content exceeds Sn alloy will be more brittle and expanded nose will fragment.
Best results in autopistols generally with largest meplat with will feed reliably and give good crush with deep, reliable penetration. Hollowpoints fragile enough to expand may fail to give adequate penetration. Their best use is for varmint shooting to reduce risk of riccochet, not for defense or use on dangerous game. Two holes give better blood trail.
Last edited by Outpost75; 09-18-2016 at 01:50 PM.
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20-1 alloy has given me good results for HP boolits, mine being used in 444 marlin and 45/70 have different issues to contend with than your auto loading pistol
The best alloy would depend on your mold. Lyman Devastators, call for wheel weights, other brands may be different. I'm using inexpensive ROTOMETAL and getting predictable results.
Unfortunately you will need to experiment to get the best alloy for your load. Velocity of the bullet and type of bullet will mandate the alloy for your bullet/gun combination. Folks advised me to use wheel weight metal with my Lyman Devastator bullet mold for the 44 Magnum. My bullets fragmented horribly with that alloy. I softened up the alloy to a BHN of 9 (about a 1:25 alloy) and got excellent expansion and weight retention. Experimentation will be the key for you and your gun/bullet/velocity combination. Have fun!
Wheel Weight Alloy
Attachment 176936
Softer Alloy
Attachment 176937
It depends too on the size of the HP's hole, width and depth and boolit profile.
What molds are you using?
a m e r i c a n p r a v d a
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I'll be using MP molds in 45acp 200 gr penta hp and 9mm 125gr penta hp they won't be for hunting target shooting and defense
I use a soft range scrap alloy (unknown composition) that measures about 8 BHN, for my revolver HP molds and HB molds, all of which have a fairly large hollow area.
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20 - 1 is what I use for the HP boolets I use in .45 LC and .44 Mag. with decent results if I keep an eye on how fast I`m driving them.Robert
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| BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
| BR | Bench Rest | M | Magnum | RN | Round Nose |
| BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
| C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
| HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
| PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
| LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
| GC | Gas Check |
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