Hi,
I'm relatively new to reloading although, I've had some great success in my process, and I'm really enjoying it.
However, I just came across an "old" batch of resized .308 cases that I had planned on using for my 150gr Barnes MPG's. (multi purpose greens)... initially, I thought I'd use my comparator and set my relative headspace to 1.620... so, I went ahead and cranked out 50 cases at 1.620.... then, I put them away, and kind of set them aside for a while... I jumped over to reload for my Mini-14, Ruger American, DMR and my SPR.
Now, I'm back to my plan to reload for those MPG's.... I re-sized another batch of 100 cases, but, decided to set the bump to - .003 which lands me at 1.624/ 1.626.
I decided not to stick with the 1.620 because I had learned that a .006 shoulder bump may overwork the brass.
So, now my inventory will have some with 1.620 relative headspace and others around 1.624/ 1.626....
Should I be concerned?
I'm going to the range next week and I'm going to compare accuracy and chrono for (5) loads from each set (1.620 vs 1.626).... (150gr Barnes MPG with 45gr of VV N540).
These are for my 16" AR10 "blaster" build..... meant for extreme scenarios under 300 yards, so, I'm not too concerned about 1/2 MOA accuracy....
The reason I chose 1.620 for the MPG's is that many of my other 150gr factory .308 rounds are set at 1.620.... but, most other of my factory .308 rounds are between 1.624 to 1.626.
So, I'm going to just focus on setting my bump to -.002/.003 which lands me between 1.624/1.626 for general reloading purposes.....
although these rounds will be for my 16" AR-10, I want them to fit universally in any of my .308's....
But, as far as having a mixed batch with relative headspace ranging from 1.620 to 1.626, do you see any issues?
(I've got my (3) AR-10's pictured: 16" Wilson Combat Recon; 18" Bartlein, and 24" Shaw Bull........and, a picture of my "reloading station" on top of my wife's dresser).... the bartlein has a slightly smaller chamber and is more sensitive to hotter loads.....
I'm relatively new to reloading although, I've had some great success in my process, and I'm really enjoying it.
However, I just came across an "old" batch of resized .308 cases that I had planned on using for my 150gr Barnes MPG's. (multi purpose greens)... initially, I thought I'd use my comparator and set my relative headspace to 1.620... so, I went ahead and cranked out 50 cases at 1.620.... then, I put them away, and kind of set them aside for a while... I jumped over to reload for my Mini-14, Ruger American, DMR and my SPR.
Now, I'm back to my plan to reload for those MPG's.... I re-sized another batch of 100 cases, but, decided to set the bump to - .003 which lands me at 1.624/ 1.626.
I decided not to stick with the 1.620 because I had learned that a .006 shoulder bump may overwork the brass.
So, now my inventory will have some with 1.620 relative headspace and others around 1.624/ 1.626....
Should I be concerned?
I'm going to the range next week and I'm going to compare accuracy and chrono for (5) loads from each set (1.620 vs 1.626).... (150gr Barnes MPG with 45gr of VV N540).
These are for my 16" AR10 "blaster" build..... meant for extreme scenarios under 300 yards, so, I'm not too concerned about 1/2 MOA accuracy....
The reason I chose 1.620 for the MPG's is that many of my other 150gr factory .308 rounds are set at 1.620.... but, most other of my factory .308 rounds are between 1.624 to 1.626.
So, I'm going to just focus on setting my bump to -.002/.003 which lands me between 1.624/1.626 for general reloading purposes.....
although these rounds will be for my 16" AR-10, I want them to fit universally in any of my .308's....
But, as far as having a mixed batch with relative headspace ranging from 1.620 to 1.626, do you see any issues?
(I've got my (3) AR-10's pictured: 16" Wilson Combat Recon; 18" Bartlein, and 24" Shaw Bull........and, a picture of my "reloading station" on top of my wife's dresser).... the bartlein has a slightly smaller chamber and is more sensitive to hotter loads.....
