BigBoreBubba
Member
- Joined
- Jul 23, 2021
- Messages
- 184
Hi all, first time posting here, though I’ve been a lurker for a long time.
My question is actually in several parts. I’m still fairly new to reloading, but have loaded quite a few rounds in quite a few calibers. However, this is my first go-around loading the 460.
I will be loading 300gr. XTP Mags. Here’s where the “conundrum” starts. I’ll be using H-110 powder, but I’m getting tremendously conflicting load data. My Lyman manual lists a starting load of 34.0 with a max of 38.0, my Lee manual lists a starting load of 38.0 and a max of 42.5, while my Hornady manual lists a starting load of 33.4 and a max of 39.2.
Listed velocity is also very conflicting. Lyman lists 1798 fps @ 34.0gr while Hornady lists 1400 fps @ 33.4.
Lyman load data tops out at 1966 fps @ 38.0, while Lee data starts at 38.0 for 1825 fps. Meanwhile Hornady data tops out at 39.2gr for 1550fps and Lee data tops out at 42.5gr for 2034 fps. This seems like wildly differing data from three well respected sources.
I know that H-110 doesn’t like to be under charged and usually does best towards the top end of load data, but this is a much bigger spread than I have ever seen between starting and max.
To add to this mess, all of my books say Large Pistol Magnum or Large Rifle primers, and to use the appropriately according to your brass. I know that is the case with 500 S&W (which I also load), but in it’s case, the brass is stamped with an “R” if it takes a rifle primer. None of my 460 brass is marked as such. I have a mix of Starline, Hornady and Federal brass. So, I proceeded to measure primer pocket depths on about 50 pieces of brass. I got numbers ranging from 0.1275 through 0.132, with the average being 0.129-0.1305. That’s a spread of nearly 0.005, mostly within Starline brass. So, I’m not even sure which primers to use now….
Any advice, especially based on experience, would be greatly appreciated. Thanks ahead of time.
My question is actually in several parts. I’m still fairly new to reloading, but have loaded quite a few rounds in quite a few calibers. However, this is my first go-around loading the 460.
I will be loading 300gr. XTP Mags. Here’s where the “conundrum” starts. I’ll be using H-110 powder, but I’m getting tremendously conflicting load data. My Lyman manual lists a starting load of 34.0 with a max of 38.0, my Lee manual lists a starting load of 38.0 and a max of 42.5, while my Hornady manual lists a starting load of 33.4 and a max of 39.2.
Listed velocity is also very conflicting. Lyman lists 1798 fps @ 34.0gr while Hornady lists 1400 fps @ 33.4.
Lyman load data tops out at 1966 fps @ 38.0, while Lee data starts at 38.0 for 1825 fps. Meanwhile Hornady data tops out at 39.2gr for 1550fps and Lee data tops out at 42.5gr for 2034 fps. This seems like wildly differing data from three well respected sources.
I know that H-110 doesn’t like to be under charged and usually does best towards the top end of load data, but this is a much bigger spread than I have ever seen between starting and max.
To add to this mess, all of my books say Large Pistol Magnum or Large Rifle primers, and to use the appropriately according to your brass. I know that is the case with 500 S&W (which I also load), but in it’s case, the brass is stamped with an “R” if it takes a rifle primer. None of my 460 brass is marked as such. I have a mix of Starline, Hornady and Federal brass. So, I proceeded to measure primer pocket depths on about 50 pieces of brass. I got numbers ranging from 0.1275 through 0.132, with the average being 0.129-0.1305. That’s a spread of nearly 0.005, mostly within Starline brass. So, I’m not even sure which primers to use now….
Any advice, especially based on experience, would be greatly appreciated. Thanks ahead of time.