LegionShooter Posted May 16, 2014 Share Posted May 16, 2014 Headed out to test fire first reloads tomorrow. I have PD 180 RNFP that are set at 1.178 (reading between 1.176 and 1.180 when I measure them). I just ran some dummy rounds with BBI 180s that are reading 1.215 with same seating die. If I reset the die to get the BBI to 1.18 OAL how much do I need to worry about the decrease in case volume causing pressure issues? I'll be working up a load for 3N37 and now for N320 which I just got from FedEx about 10 minutes ago. How many different powder charges does everyone tend to take to the range on the first go and in what increasing increments? Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted May 16, 2014 Share Posted May 16, 2014 If these are "first reloads", I'd keep them all under Major. Work up slowly to Major with the .40. Link to comment Share on other sites More sharing options...
earthshine402 Posted May 16, 2014 Share Posted May 16, 2014 if i were you, i would adjust the seating die to the desired OAL for each bullet, not use one die setting for different bullets. Link to comment Share on other sites More sharing options...
LegionShooter Posted May 16, 2014 Author Share Posted May 16, 2014 (edited) if i were you, i would adjust the seating die to the desired OAL for each bullet, not use one die setting for different bullets. Understood. If I decide to run both the PDs and the BBIs at 1.18 though, would I have to adjust powder charge to compensate for lesser case volume? Or is the difference not enough to be concerned with since both are 180gr bullets? Edited May 16, 2014 by LegionShooter Link to comment Share on other sites More sharing options...
Brenden Posted May 16, 2014 Share Posted May 16, 2014 if i were you, i would adjust the seating die to the desired OAL for each bullet, not use one die setting for different bullets. Understood. If I decide to run both the PDs and the BBIs at 1.18 though, would I have to adjust powder charge to compensate for lesser case volume? Or is the difference not enough to be concerned with since both are 180gr bullets? Start with a well below max powder charge, the one with less case volume will have higher pressure. A chronograph is very useful in this situation, you could find that both bullets yield a similar fps. Link to comment Share on other sites More sharing options...
Jakobi Posted May 16, 2014 Share Posted May 16, 2014 Every time you change a component (powder, primer, or bullet) you should start load development over. EVERY. TIME. If you're being really picky (like I am with rifle ammo) then you would also start over when you change what brass your are using. -Jake Link to comment Share on other sites More sharing options...
earthshine402 Posted May 17, 2014 Share Posted May 17, 2014 Every time you change a component (powder, primer, or bullet) you should start load development over. EVERY. TIME. If you're being really picky (like I am with rifle ammo) then you would also start over when you change what brass your are using. -Jake Don't worry about brass with .40. Waste of time. The only instance I can think of where it might be meaningful is if this is for bullseye shooting. Develop each load independently. I really don't like the idea of using the same seating setting and getting different OALs and worrying about case volume. This seems a bit lazy. Develop the loads with a chrono as someone else mentioned and you should get some meaningful results. Link to comment Share on other sites More sharing options...
jimbullet Posted May 18, 2014 Share Posted May 18, 2014 LegionShooter, I would be interested in what you find (change in velocity) using the two different ammo's (1.215 and 1.180 OAL) of 180 gr projectiles. Interested to see the spreads on yours. Link to comment Share on other sites More sharing options...
LegionShooter Posted May 19, 2014 Author Share Posted May 19, 2014 LegionShooter, I would be interested in what you find (change in velocity) using the two different ammo's (1.215 and 1.180 OAL) of 180 gr projectiles. Interested to see the spreads on yours. Ran the 1.18s yesterday but haven't run the 1.21s yet. I'll put up the spreads once I do though. Link to comment Share on other sites More sharing options...
tac_driver Posted May 25, 2014 Share Posted May 25, 2014 start at least 10% of max and work up using a chronograph if you change any component of the load start over you can't be too safe when reloading ammo check every round for proper powder depth Link to comment Share on other sites More sharing options...
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