Quickload help..

[Sniper338]

284 win
Norma brass
54.5gr H4831sc
168gr berger vld
15 inch barrel
Fed match primer

Can anyone give me a +- on what my velocity should be?

 

[fatelvis]

It says 2546 fps, but using default h2O capacity (66.0 grns water), you're at 108.5% capacity and 67,947 psi. SAAMI max is 63,817 psi. 50.2 grns of that powder would give you 100% case fill, 2308 fps, and 50,989 psi pressure. FYI, Top safe velocity with that bullet would be 48.2 of RL17 for 2449 fps and 55,840 psi.

 

[Sniper338]

That all dont sound right then. Its in an xp100 pistol so Im sure that makes a difference in charge weight. It is in the node for it. I just dont have a chrony. No pressure signs what so ever, I could go up more, it isnt max by any means. Not even flat primers, nada, nothin, zip.. its a good load for it..

 

[Kurz]

You haven't taken into account the OAL of the cartridge. Try the load at 3.100" for the OAL.

 

[Murray Brook]

What is the OAL of your round and capacity of your fired case in grains of H2O. This will give you a some what more accurate #.

 

[Sniper338]

What is the OAL of your round and capacity of your fired case in grains of H2O. This will give you a some what more accurate #.

Crap I dont know, Im not at home.. its single shot, its seated out. Oh well. I dodnt know it needed h20 capacity.

 

[fatelvis]

You haven't taken into account the OAL of the cartridge. Try the load at 3.100" for the OAL.

Ahhh, much better.... Using 3.1" OAL (default was 2.8") with 54.5 grns powder, the velocity dropped to 2393 fps, and the pressure also dropped to 55,367 psi. The case fill rate is 99.7%. Sounds like a good load.

 

[Sniper338]

Ahhh, much better.... Using 3.1" OAL (default was 2.8") with 54.5 grns powder, the velocity dropped to 2393 fps, and the pressure also dropped to 55,367 psi. The case fill rate is 99.7%. Sounds like a good load.

Well it worked this morning... put the smack down on the biggest buck of my life. That burger VLD was like a grenade.

 

[Murray Brook]

Crap I dont know, Im not at home.. its single shot, its seated out. Oh well. I dodnt know it needed h20 capacity.

The more accurate input you put into the program the more accurate will the results be that the program gives you. Case cap can have as big an effect as oal.

 

[fatelvis]

Well it worked this morning... put the smack down on the biggest buck of my life. That burger VLD was like a grenade.

Congrats on the buck! It sounds like you have the loaded and empty cartridges handy now...So tell me, what is the actual OAL of a loaded cartridge? Can you fill the case with water and weigh the contents?

 

[Sniper338]

Congrats on the buck! It sounds like you have the loaded and empty cartridges handy now...So tell me, what is the actual OAL of a loaded cartridge? Can you fill the case with water and weigh the contents?

Im still not home. I dont have a scale on me. I did happen to have a set of mitoyo micrometers in my center consol I found. 3.1570 OAL

 

[fatelvis]

Using 3.157" OAL, the velocity went down a little to 2366 fps, and the pressure to 53,529 psi. Fill is at 98.2%.