DIY store bought cost effective pipe tubing 45 long colt 410 shotgun pistol

what ; pipe or tube diameter & sheduale match 12 Gauge & or .410 bore or chamber well "structural member" "tube" is measured with an "exact diameter tolerances ", much tighter than gas or fluid transport "Pipe" Measured as nominal

diameters
BUT

Tube or pipe is measured by outside or inside diameter
yes

SCH 40 Pipe
3/8 = 0.675 inch OD 0.493 inch ID = 410
3/4 = 1.050 inch OD 0.824 inch ID = 12 g case
1/1 = 1.315 inch OD 1.049 inch ID = shell

SCH 80 XHY
3/4 = 1.050 inch OD 0 .742 inch ID = 12 g bore

SCH 160
1/1 = 1.050 inch OD 0.815 inch ID = 12 g case

$020 mix & match of pipe/tube for a DIY firearm vs
$090 12 Gauge barrel only
$091 .410 break action
$115 12 Gauge break action
$142 12 Gauge pump action
$167 .410 & .22 break action
$250 .410 pump action
$300 410 45lc
$480 12 gauge Break Open smooth bore pistol Diablo muzzleloader 209
$999 Desert Eagle .50 Caliber semi auto Handgun

if a .45 bullet fits all the way through A .410 / 36 gauge bore & choke its
posibly ok but what about a street legal 45 colt as a .410 shotgun pistol

maximum chamber pressure speed weight diameter type & cost
14,000 PSI .45 long Colt 1125 fps 160 grain .452 bullet $1.25
18,000 PSI .410 shotgun 1775 fps 109 grain .410 slug $1.25

rimmed case length Base & Rim diameter near .45 colt & 410
1.383 .480 .512 = .454 Casull based on the
1.600 .480 .512 = .450 Colt
1.800 .478 .520 = .460 S&W Magnum
2.500 .470 .535 = .410 shell

ps: the 45 Colt & 45 Long Colt are the same round just another
name & the answer is NO you do not want a hand cannon

see also runway sub cal Popa Gun Kit .410

http://web.archive.org/web/20180805130116/http://popasurvivalgunkit.com/

http://archtoolbox.com/materials-systems/plumbing/standard-pipe-dimensions.html
http://emjmetals.com/pdf_indexer/pdfs/Tubing_and_Pipe.pdf **
http://ammoland.com/2016/09/45-colt-vs-45-long-colt/
http://thefiringline.com/forums/showthread.php?t=216972

http://en.wikipedia.org/wiki/Threaded_pipe
http..