Sharpeneddark
Ultimate Member
Hi all!
I've recently completed my first batch of .308 reloads and just wanted to have a sanity check, to make sure I've done everything correctly and nothing seems out of spec. Mostly because the numbers between IMR's load data and Hornadys seems to be different
What I have:
Hornady 150 gr Interlock SP bullets (Item number 3031)
IMR 4895 - one set of rounds loaded to 42.6 gr and a second loaded to 44.0 gr.
The cases are trimmed to approx 2.005".
The bullet is seated to 1/2 cannelure (not crimped).
First, I loaded 42.6 because the IMR data sheet said this is starting load for 150 gr rounds. Later, after I seated my load of rounds, I thought it may be prudent to get the Hornady book and see what it said. It says the range for 4895 with their bullets is 37.7 to 44.7. This has me a little concerned for the rounds I loaded to 44. Especially when it comes to the seat depth. The Hornady book says COL for this round should be 2.735. With my rounds seated to 1/2 cannelure, per the book's instruction, my COL is averaging 2.750". Should I be concerned and pull apart my 44 gr loads and reduce powder or reseat the bullets?
I also have some FMJ-BT bullets I want to try. Item number 3037 in the book. That COL says it should be 2.700", but when I made my dummy round, COL was 2.716". Am I doing something wrong or am I over thinking this by a lot and my loads should be safe to try?
Thanks for the advice!
Edit: One last thing I forgot to mention. I'll be shooting these out of an AR-10. 18" 1:10 twist barrel.
I've recently completed my first batch of .308 reloads and just wanted to have a sanity check, to make sure I've done everything correctly and nothing seems out of spec. Mostly because the numbers between IMR's load data and Hornadys seems to be different
What I have:
Hornady 150 gr Interlock SP bullets (Item number 3031)
IMR 4895 - one set of rounds loaded to 42.6 gr and a second loaded to 44.0 gr.
The cases are trimmed to approx 2.005".
The bullet is seated to 1/2 cannelure (not crimped).
First, I loaded 42.6 because the IMR data sheet said this is starting load for 150 gr rounds. Later, after I seated my load of rounds, I thought it may be prudent to get the Hornady book and see what it said. It says the range for 4895 with their bullets is 37.7 to 44.7. This has me a little concerned for the rounds I loaded to 44. Especially when it comes to the seat depth. The Hornady book says COL for this round should be 2.735. With my rounds seated to 1/2 cannelure, per the book's instruction, my COL is averaging 2.750". Should I be concerned and pull apart my 44 gr loads and reduce powder or reseat the bullets?
I also have some FMJ-BT bullets I want to try. Item number 3037 in the book. That COL says it should be 2.700", but when I made my dummy round, COL was 2.716". Am I doing something wrong or am I over thinking this by a lot and my loads should be safe to try?
Thanks for the advice!
Edit: One last thing I forgot to mention. I'll be shooting these out of an AR-10. 18" 1:10 twist barrel.