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Well-Known Member
I'd like to ask your opinions on the estimates Quickload is spitting out to me for the calibers listed below and how they match up with reality.
My primary goal with this is not necessarily obtain "real world" velocity figures, but rather ensure I'm making proper assumptions in the "ranking" or order in how these calibers compare to each other velocity wise under a set of given parameters like barrel length, load density and chamber pressures. I realize individual barrels, chambers, etc will have a large factor in velocity variations between guns, even of the same caliber and chambered with the same reamer.
I find value with both of the following postings by Mr. Carlock and Mr. Kirby at the links below.
http://www.longrangehunting.com/for...ber-build-advice-33343/index3.html#post250907
http://www.longrangehunting.com/for...ber-build-advice-33343/index9.html#post252002
Again, I'm just wanting to ensure I'm making proper assumptions about the "jump" or potential difference in velocity between the different chamberings.
Quickload parameters:
28" barrel
300 grain SMK
103 to 90% load density
3.815 Overall Loaded Cartridge Length
SAAMI max pressure not exceeded
338 Lapua (SAAMI reamer print)
116 grains of water to case overflow
2770-2840 fps
338 Lapua Improved (PTG reamer print)
126 grains of water to case overflow
2805-2885 fps
338-378 Wby (SAAMI reamer print)
130 grains of water to case overflow
2815-2890 fps
338-378 Kahn? (I don't have a reamer print...anyone care to share one?-PM me)
338 Excalibur (A-Square/Manson reamer print)
138 grains of water to case overflow
2845-2920 fps
If something seems out of the ordinary, I'd appreciate your feedback and the "why" behind it.
I've got this posted at a few other forums, so if you see it there feel free to post up again. To me this is all about sharing knowledge and experience with others.
Thanks!
BTW-This all Broz's fault after his post of his Mark V Lapua
My primary goal with this is not necessarily obtain "real world" velocity figures, but rather ensure I'm making proper assumptions in the "ranking" or order in how these calibers compare to each other velocity wise under a set of given parameters like barrel length, load density and chamber pressures. I realize individual barrels, chambers, etc will have a large factor in velocity variations between guns, even of the same caliber and chambered with the same reamer.
I find value with both of the following postings by Mr. Carlock and Mr. Kirby at the links below.
http://www.longrangehunting.com/for...ber-build-advice-33343/index3.html#post250907
http://www.longrangehunting.com/for...ber-build-advice-33343/index9.html#post252002
Again, I'm just wanting to ensure I'm making proper assumptions about the "jump" or potential difference in velocity between the different chamberings.
Quickload parameters:
28" barrel
300 grain SMK
103 to 90% load density
3.815 Overall Loaded Cartridge Length
SAAMI max pressure not exceeded
338 Lapua (SAAMI reamer print)
116 grains of water to case overflow
2770-2840 fps
338 Lapua Improved (PTG reamer print)
126 grains of water to case overflow
2805-2885 fps
338-378 Wby (SAAMI reamer print)
130 grains of water to case overflow
2815-2890 fps
338-378 Kahn? (I don't have a reamer print...anyone care to share one?-PM me)
338 Excalibur (A-Square/Manson reamer print)
138 grains of water to case overflow
2845-2920 fps
If something seems out of the ordinary, I'd appreciate your feedback and the "why" behind it.
I've got this posted at a few other forums, so if you see it there feel free to post up again. To me this is all about sharing knowledge and experience with others.
Thanks!
BTW-This all Broz's fault after his post of his Mark V Lapua