Last edited by Tar Heel; 09-09-2021 at 05:05 AM.
It is my understanding that part of what the newer test methods showed were undesirable short duration "spikes". I seem to recall that Larry Gibson has found some loads with Herco with such behavior.
At one time, ammo & guns relied on proof testing. Copper/lead crusher testing was an attempt to better quantify and standardize margins between safe and unsafe loads. However, the way that crusher testing was used was later found to be be much less effective at ensuring safe margins than desired.
We need lab grade testing with good equipment to ensure powder / cartridge / bullets combinations are "well behaved".
Tools like Quickload are very helpful when the desired powder has been shown to be "well behaved" for the application and the powder is in the database. 300MP has very limited test data and it is not in the Quickload database.
When I was looking at 300MP it was to get away from H110/WW296 (I used them for years but eventually decided they were too finicky for my liking). Lil gun has a less than sterling reputation and I really did not want to go from the frying pan to the fire. Eventually I found some powders that do the job and seem more predictable. WC 680 (milsurp version of AA 1680) that is a little slower and Heavy Pistol (very similar to AA #9) that is just a little faster.
300MP might have been a great fit for my needs, but the lack of data and not being in Quickload are big issues for me.
didn't they want to work up a load for you ,why would they?
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 |