04-07-2012, 02:19 PM | #1 |
Join Date: Dec 2008
Location: Cumberland, ME
|
[HT] Statting a Firearm
In a fit of foolhardy restlessness, I've started trying to lay the groundwork for a new campaign of the contemporary and reasonably realistic sort, based largely on Jagged Alliance 2.
To that end, I plan / expect to be throwing together stats for a pretty large chunk of stats that aren't in High-Tech, Pulp Guns, Gun-Fu, or Tactical Shooting, simply because I can never get a large enough selection of toys. A ludicrously vast array of options is my happy place. So I nipped over here and picked up Douglas Cole's spreadsheet, and have decided to take it for a test run using the Beretta Cx4 Storm carbine in 124gr 9x19mm Parabellum. Since I know all of jack and squat about the technical side of firearms in real life, I present my work to the hive mind for review in order to make sure I did everything properly, didn't bugger it all up, and got reasonable results considering the weapon in question. Inputs From what I can tell, this section is almost entirely from the "Cartridge Stats" sheet, with the only exception being Barrel Length, which I entered as 422.5 millimeters (16.6 inches). Everything else is straight out of the 124gr 9x19mm column on Cartridge Stats.Outputs Armor Penetration: 3d+0And that's about all I can figure out. Determining weight is easy enough from known specifications, RoF is 3 (Semiautomatic), Shots is straight-forward, and I suppose ST, Bulk, and Rcl are pretty much just "best estimates." So, thoughts? Input? Corrections? Ridicule? Last edited by Landwalker; 04-07-2012 at 02:24 PM. |
04-07-2012, 02:27 PM | #2 | ||
Join Date: Nov 2009
Location: Oregon
|
Re: [HT] Statting a Firearm
Quote:
Quote:
|
||
04-07-2012, 02:42 PM | #3 | |
Join Date: Jan 2010
|
Re: [HT] Statting a Firearm
Quote:
For example the spreadsheet gives even a 20mm barrel the same 1/2D range. Last edited by lexington; 04-07-2012 at 02:49 PM. |
|
04-07-2012, 02:47 PM | #4 | ||
Join Date: Dec 2008
Location: Cumberland, ME
|
Re: [HT] Statting a Firearm
Quote:
But if I were going to use the RAW wounding modifiers (and I intend to), why wouldn't it just be pi? That's what everything else that uses 9x19mm has. Quote:
|
||
04-07-2012, 02:49 PM | #5 | ||
Doctor of GURPS Ballistics
Join Date: Sep 2004
Location: Lakeville, MN
|
Re: [HT] Statting a Firearm
Quote:
Quote:
__________________
My blog:Gaming Ballistic, LLC My Store: Gaming Ballistic on Shopify My Patreon: Gaming Ballistic on Patreon |
||
04-07-2012, 02:51 PM | #6 |
Join Date: Nov 2009
Location: Oregon
|
Re: [HT] Statting a Firearm
True. Presumably the wounding calculations Douglas Cole used involves some combination of calibre and velocity, and GURPS doesn't take velocity into account except to distinguish between 4-8mm pistol and rifle rounds. Calling it pi would be consistent with RAW firearms, which is makes sense if you aren't planning on recalculating all the guns from HT.
|
04-07-2012, 02:51 PM | #7 | ||
Doctor of GURPS Ballistics
Join Date: Sep 2004
Location: Lakeville, MN
|
Re: [HT] Statting a Firearm
Quote:
Quote:
__________________
My blog:Gaming Ballistic, LLC My Store: Gaming Ballistic on Shopify My Patreon: Gaming Ballistic on Patreon |
||
04-07-2012, 02:53 PM | #8 | |
Join Date: Jan 2010
|
Re: [HT] Statting a Firearm
Quote:
|
|
04-07-2012, 02:55 PM | #9 | |
Doctor of GURPS Ballistics
Join Date: Sep 2004
Location: Lakeville, MN
|
Re: [HT] Statting a Firearm
Quote:
I would honestly use the "AP Damage" line {0.98} for nearly all pistol bullets. It corresponds very well with the pi/pi-/pi+ in that range. The wound channel modifiers basically are a function of something like the sqrt of a momentum term divided by a KE term (or something related to it; the equations are in the spreadsheet or my article itself). The JHP line, however, does work out pretty well. It decreased penetration based on the increased frontal area of a squashed projectile, but INcreases wounding for the same reason. Works out decently. The "normal damage" line looks at wounding when the bullet turns sideways a bit and is probably more correct for rifles with aspect ratio of 3-5 than it is for pistols.
__________________
My blog:Gaming Ballistic, LLC My Store: Gaming Ballistic on Shopify My Patreon: Gaming Ballistic on Patreon |
|
04-07-2012, 03:33 PM | #10 |
Join Date: Dec 2008
Location: Cumberland, ME
|
Re: [HT] Statting a Firearm
So for the final stat line, I'm looking at something like this:
Beretta Cx4 Storm, 9x19mm Parabellum Damage: 3d pi |
Thread Tools | |
Display Modes | |
|
|