If I understand right then you are looking into a modern replica of an aproved model?

There are lots of new production Colt takeoffs, I don't know how exact it will need to be. I believe that Uberti, Cimmaron Arms and Baretta are makeing some that might qualify. I don't know about the strength issue though.

And the request was for 1000 ft pounds of energy.
Maybe check the Hodgdon's site for 45 colt loads as they list the pressure along with it.

Oh ye nay sayers. It seems as though you haven't spent much time around the 45 colt.

As you can see from below that 1000 fps is easily obtained in a strong 45 colt revolver. Also 1000fpe is safely doable also.

325 GR. LFN PB (Maximum Loads) DIA. .452 COL: 1.680"

H4227 23.0 1189 28,000 CUP -1023fpe-
H110 24.0 1266 27,400 CUP -1155 fpe-
LIL'GUN 20.5 1235 29,700 CUP -1100fpe-

http://www.hodgdon.com/data/pistol/45coltlil.php
Hodgon load data for strong revolvers with pressure.

PISTOL DATA
NEVER Exceed the Loads Listed Here


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BULLET POWDER GR VEL CUP

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45 COLT (Ruger, Freedom Arms & T/C Only)
CASE: WINCHESTER

BBL: 7.25"
PR: WINCHESTER LP

TWIST: 1:16"
TRIM: 1.280"



240 GR. SIE JHC(Starting Loads)
DIA. .452
COL: 1.600"

LIL'GUN 27.0 1431 23,800 CUP

240 GR. SIE JHC(Maximum Loads)
DIA. .452
COL: 1.600"

LIL'GUN 27.8 1489 29,200 CUP



250 GR. HDY XTP(Starting Loads)
DIA. .452
COL: 1.600"

LIL'GUN 23.5 1331 25,800 CUP

250 GR. HDY XTP(Maximum Loads)
DIA. .452
COL: 1.600"

LIL'GUN 25.5 1410 29,800 CUP



260 GR. NOS PART(Starting Loads)
DIA. .451
COL: 1.650"

LIL'GUN 19.0 1196 24,500 CUP

260 GR. NOS PART(Maximum Loads)
DIA. .451
COL: 1.650"

LIL'GUN 21.0 1312 30,000 CUP



300 GR. SPR JFP(Starting Loads)
DIA. .451
COL: 1.650"

LIL'GUN 18.0 1140 24,500 CUP

300 GR. SPR JFP(Maximum Loads)
DIA. .451
COL: 1.650"

LIL'GUN 20.2 1203 29,800 CUP



325 GR. LFN PB (Starting Loads)
DIA. .452
COL: 1.680"

H4227 20.0 1053 22,300 CUP

H110 21.0 1109 18,100 CUP

LIL'GUN 17.0 1061 20,700 CUP

325 GR. LFN PB (Maximum Loads)
DIA. .452
COL: 1.680"

H4227 23.0 1189 28,000 CUP

H110 24.0 1266 27,400 CUP

LIL'GUN 20.5 1235 29,700 CUP



335 GR. WLN GC (Starting Loads)
DIA. .452
COL: 1.680"

H4227 20.0 1011 21,100 CUP

H110 20.5 1109 19,200 CUP

LIL'GUN 17.0 1052 20,100 CUP

335 GR. WLN GC(Maximum Loads)
DIA. .452
COL: 1.680"

H4227 22.5C 1155 28,300 CUP

H110 23.5 1240 28,000 CUP

LIL'GUN 20.0 1206 29,600 CUP



360 GR. WLN GC (Starting Loads)
DIA. .452
COL: 1.680"

H4227 19.5 1004 21,100 CUP

H110 18.0 1012 20,200 CUP

LIL'GUN 15.5 984 22,400 CUP

360 GR. WLN GC (Maximum Loads)
DIA. .452
COL: 1.680"

H4227 22.0C 1167 29,800 CUP

H110 21.0 1151 28,300 CUP

LIL'GUN 18.0 1131 29,700 CUP

lar45 thank god someone undrestands the 45lc like i do, been shooting one for over 20 yrs, nothing beats that big slow bullet