only1asterisk
member
- Joined
- Jun 13, 2003
- Messages
- 2,412
Zak,
The case of the 5.45 is of lesser diameter than either of the cartridges we are discussing here having a rim diameter of something less than .400". I don't know of any reloadable brass, so I've never worked with it. The shoulder would appear to something less than 25 degrees. The critical difference in the shoulder diameter and neck/bullet diameter that Mr. Brennan brings up (and I neglected to mention) is close to that of the 6.5 Grendel, in every other way it has equal or better features in regard to feeding (it may have less case taper, which may not be a good thing). In all, generically (not just in the AR) I'd have to call it a better feeder overall pending detailed drawings.
Mr. Brennan
I didn't mean to imply that the 6.5 Grendel had no case taper. I had always assumed there was somewhat more taper than the PPC series. I don't have a detailed drawing of the Grendel, only what I can infer from what has been posted here and elsewhere. For puposes of comparison I had guessed about .020" of case taper. I'd love to get my hand on the materials I mentioned in above post and run some simulations with my own numbers (for both the grendel and 6.8).
Doesn't Alexander make uppers for the 5.45?
The case of the 5.45 is of lesser diameter than either of the cartridges we are discussing here having a rim diameter of something less than .400". I don't know of any reloadable brass, so I've never worked with it. The shoulder would appear to something less than 25 degrees. The critical difference in the shoulder diameter and neck/bullet diameter that Mr. Brennan brings up (and I neglected to mention) is close to that of the 6.5 Grendel, in every other way it has equal or better features in regard to feeding (it may have less case taper, which may not be a good thing). In all, generically (not just in the AR) I'd have to call it a better feeder overall pending detailed drawings.
Mr. Brennan
I didn't mean to imply that the 6.5 Grendel had no case taper. I had always assumed there was somewhat more taper than the PPC series. I don't have a detailed drawing of the Grendel, only what I can infer from what has been posted here and elsewhere. For puposes of comparison I had guessed about .020" of case taper. I'd love to get my hand on the materials I mentioned in above post and run some simulations with my own numbers (for both the grendel and 6.8).
Doesn't Alexander make uppers for the 5.45?