Omegaspeedy said:I've looked at the work that Lee carried out regarding pressure and bullet hardness and was hoping that because this was carried out before the powder coating fad, it applied only to plain lubed lead bullets and somehow powder coating might make a small difference in lead resistance performance.
It would have to be both harder and very thick at the base to do much in that department. However, you are right about the smooth bores of the hand-assembled S&W revolvers made between the WW's.
You should slug your bore and measure its diameter rather than guess. You do need a pure lead slug so it isn't springy. The Hornady round balls work. 22 rimfire standard velocity bullet alloy is generally soft enough so that if you cast a slug from it, it is malleable and inelastic enough to work.
For that matter, you might consider making a chamber cast, too, and looking at the freebore. I've found my Marlins like bullets about groove +0.002" better than the usual +0/001", but YMMV. I've found my Tumble Lube bullets shoot best as-cast; no sizing. But the coating would necessarily change that if I were using it.
Before they relaxed the MSDS reporting requirements, the alternate names used to appear in them. From 2009 versions of MSDSs, I culled the following information:
Code:
Powders from 2009 MSDS sheets (some newer MSDS sheets lack the powder name information due to
changes in MSDS requirement regulations).
Note that bulk grade versions have wider burn rate specs and can vary significantly from the
canister grades, which are controlled for burn rate by blending with held back fast or slow
lots, as needed to adjust them to within ±3% of their nominal burn rates.
Canister | Bulk Grade | Canister | Canister | Canister |
Grade | | Grade | Grade | Grade |
| St. Marks | | | |
Hodgdon | Mil & OEM | Winchester | Thales | IMR |
___________________|__Numbers___|________________________|__(ADI)___|______________________|_
| | | | |
HP-38--------------|-- OBP231 --|- 231 ------------------|----------|----------------------|-
| OBP124 | AALite (WFL) | | |
Titewad | OBP132 | | | |
Tightgroup --------|-- OBP242 --|------------------------|----------|----------------------|-
| OBP465 | Super-Handicap (WSH) | | |
Longshot | OBP473 | | | |
Lil' Gun ----------|-- OBP516 --|------------------------|----------|----------------------|-
Hybrid 100V | SHP771 | | | |
| SMP224 | AutoComp | | |
-------------------|--- WAA90 --|- WST ------------------|----------|----------------------|-
H110 | WC296 | 296 | | |
HS-6 | WC540 | 540 | | |
HS-7 | WC571 | 571 | | |
-------------------|--- WC748 --|- 748 ------------------|----------|----------------------|-
H414 | WC760 | 760 | | |
H335 | WC844 | | | |
BL-C(2)------------|--- WC846 --|------------------------|----------|----------------------|-
H380 | WC852 | | | |
US869 | WC869 | | | |
-------------------|-- WMR780 --|- Supreme 780 ----------|----------|----------------------|-
| WXC170 | WSF | | |
Clays | | | AS30N | |
International Clays|------------|------------------------|- AS50N --|----------------------|-
Universal Clays | | | AP70N | |
H4227 | | | AR2205 |IMR 4227 second source|
H4198 -------------|------------|------------------------|- AR2207 -|----------------------|-
| | | BM1 | |
H322 | | | AR2219 | |
Benchmark | | | BM2 | |
-------------------|------------|------------------------|- AR2210 -|- IMR 8208 XBR -------|-
H4895 | | | AR2206H | |
Varget | | | AR2208 | |
H4350 -------------|------------|------------------------|- AR2209 -|----------------------|-
H4831 | | | AR2213 | |
H4831SC | | | AR2213SC | |
H1000 -------------|------------|------------------------|- AR2217 -|----------------------|-
Retumbo | | | AR2225 | |
H50BMG | | | AR2218 | |
-------------------|------------|------------------------|- AR2215 -|IMR 4198 second source|
| | | AS25BP |IMR Trail Boss |
Gray Lion said:In my experience, pistol marksmen don't use cast rounds. Too many variables at play for consistent accuracy.
I shot NRA Bull's-eye matches for many years, and cast bullets dominated the centerfire and 45 phases all down the line. Some used swaged bullets. Almost nobody fired commercial JSWC's because of the expense. I've sandbagged a good number of 1" 25-yard groups with them. They have to be made well, of course. Find a supplier you trust and you may be surprised how well they can work. Have beat commercial swaged bullets with them many times in side-by-side comparisons.