04-06-2022, 12:35 PM | #31 | |
Join Date: Aug 2007
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Re: [Shotguns] Is this a house rule?
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Full "P" is for proectiles of 5mm to 9.9mm at 600 metrs per second and projectiles under 600 meters per second between 8mm and 9.9mm. At 10 mm to 14.9mm all projectiles are P+ (unless this is lowered by ammo type". Over 15mm is P++ with the usual caveat about ammo type. Complicating this is that there are "P" class errors in every Gurps book I can think of except HT (and perhaps some of Hans shorter projects). However I am _ery_ sure that the above are the correct rules.
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Fred Brackin |
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04-06-2022, 01:25 PM | #32 | |
Join Date: Jun 2013
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Re: [Shotguns] Is this a house rule?
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GURPS Overhaul |
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04-06-2022, 01:35 PM | #33 |
Join Date: Aug 2007
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Re: [Shotguns] Is this a house rule?
No, 10mm is the breakpoint. This is why 9mm is 2D+2P and .40 S&W is 2D+2P+.
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Fred Brackin |
04-06-2022, 01:43 PM | #34 |
Join Date: Jun 2013
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Re: [Shotguns] Is this a house rule?
Unfortunate. I suspect nothing would seriously break if using "WM is equal to caliber in cm." Perhaps to better fit the existing WM's, considering .50" (12.7 mm) is right in the middle of the pi+ (WM=1.5) range, perhaps "WM is equal to five times the caliber in inches; drop anything beyond tenths" would work - .50" is 1.5, 9 mm (0.35") is 1.05 (round down to 1.0), 5 mm (0.2") is 0.6, etc. But I digress...
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GURPS Overhaul |
04-06-2022, 01:57 PM | #35 |
Join Date: Aug 2007
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Re: [Shotguns] Is this a house rule?
.......You preface all relevent discussions with "My House Rule is......". without that more people will end up confused.
If you wonder, the selection of where to put the breakpoint is actually older than the .40 S&W. At the time there were no rounds just over the line between 9mm and the .45 aCP.. Only more powerful things like the 10 x 25mm Auto and the .41 Magnum.
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Fred Brackin |
04-06-2022, 02:07 PM | #36 |
Join Date: Jun 2013
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Re: [Shotguns] Is this a house rule?
I try to do so when I'm purposefully discussing house rules - in this case, I honestly thought 10mm was within the pi range (and thought 12.7mm - aka .50 caliber - was near the bottom end of the pi+ range, rather than more-or-less right in the middle of it). I've edited the erroneous post to use 9mm and 18mm to avoid confusion, so thank you for the correction (I try to be clear in my posts, as the last thing I want to do is confuse somebody).
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GURPS Overhaul |
04-06-2022, 03:34 PM | #37 | |
Join Date: Aug 2004
Location: Wellington, NZ
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Re: [Shotguns] Is this a house rule?
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The 7.62x25mm Tokarev also messes with this threshold a bit - what HT would call 'Extra-Powerful' loads would go over it, especially if fired from a submachinegun, but is pi- in all cases. And then there's the .30 Carbine round, which has a muzzle velocity just over 600 m/s and is pi. Fine as fas as it goes, but HT lists a cut-down version of the M1 carbine with a shorter barrel that does less damage but still does pi, even though the muzzle velocity is sure to be under 600 m/s. Thus the threshold would appear to be 'soft' and possibly also sliding with calibre. It's also possible (though not as likely, I think) that it's based on energy and calibre - this would explain all the above cases, at least at first glance.
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Rupert Boleyn "A pessimist is an optimist with a sense of history." |
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04-06-2022, 04:55 PM | #38 | |
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Join Date: Sep 2004
Location: Southeast NC
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Re: [Shotguns] Is this a house rule?
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Edit: Although if you say there were no rounds between 9mm and .45 in then current, widespread use, that would be generally true.
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RyanW - Actually one normal sized guy in three tiny trenchcoats. Last edited by RyanW; 04-06-2022 at 05:56 PM. |
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04-06-2022, 09:18 PM | #39 | |
Join Date: Aug 2007
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Re: [Shotguns] Is this a house rule?
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I know about your other exceptions and I tend t think that the "P" changes don't always get included in text-only variants. At least HT tables get the P class right.
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Fred Brackin |
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