1911Tuner
Moderator Emeritus
Here's what I found:
Specs are all within tolerance except the mainspring housing hole in the
frame. Approximately .002 inch out of square. There was enough stack-up between the holes and the hole in the Brown MSH that the pin wouldn't
go through. The hole in the MSH is on the low side, and I need to find,
beg, borrow or steal a .265 reamer to make it work. Minor detail. Not an
issue if the OEM housing is left in place.
The frame rails were square to within .001 inch end to end. The ways were
off by .005 inch, front to rear. Slide is flush with frame at the rear, and thumb safety fits perfectly in its notch when engaged.
The ejector is pinned.
Slidestop and grip safety are MIM. Hammer strut appears to be cast.
Hammer, sear and disconnect are MIM. Trigger shoe appears to be cast.
Trigger bow is straight and appears to be hard to within spec. Hammer
has a shelf instead of a captive half-cock notch. Bushing appears to
be machined steel. Clearance between bushing and slide is .002 inch. barrel to bushing is .003 inch. Could be better...Could be worse.
Extractor is barstock and tension was correctly set. Has Springfield
corrected the extractor issue of recent times? Time will tell.
Surprise! The disconnect was prepped/polished on the face and on the
48 degree angle on the backside. Nice touch, Springfield. The tops of the
sear spring legs were angled, but not polished. Trigger and disconnector reset were positive. All safeties were functional and correct. I stoned the
angle on the top and bottom of the trigger stirrup, polished the back, and stoned the tops of the sear legs smooth before reassembly. Also lightly
stoned the trigger bow on the corners, lengthwise to break the sharp edges.
Link pin is tight. Link is correct length and the vertical lockup is on the lower lug. Slidestop pin rubs the lug lightly as it breaks around the
front radius of the lower lug, and barely holds the pin off the radius
at the tangent. Dang near perfect.
Vertical barrel lockup is tight with no movement when pressed hard with at the hood the pistol in battery.
Prussian Blue dye on the lugs and three rounds fired indicates approximately 95% lug engagement with even contact on the faces. Linkdown timing is good, with .015 inch of clearance between slide and barrel at .250 inch slide travel.
Barrel throat is forward of the top of the ramp approximately .035 inch...
Perfect. Sharp edge at the top of the throat was lightly scraped and
polished.
Bore is clean and bright with sharp corners on the lands. Headspace
is within spec as checked with Go/No-Go gauges.
Three test rounds produced smooth chambering and positive ejection,
with slidelock on empty.
Tight schedule requires a standby at this point. I'll edit and add more
in a while.
Later on!
Edit: Closer exaination of the bushing after removing a little of the parkerizing revealed what appears to be a parting line. Cast?
Tuner
Specs are all within tolerance except the mainspring housing hole in the
frame. Approximately .002 inch out of square. There was enough stack-up between the holes and the hole in the Brown MSH that the pin wouldn't
go through. The hole in the MSH is on the low side, and I need to find,
beg, borrow or steal a .265 reamer to make it work. Minor detail. Not an
issue if the OEM housing is left in place.
The frame rails were square to within .001 inch end to end. The ways were
off by .005 inch, front to rear. Slide is flush with frame at the rear, and thumb safety fits perfectly in its notch when engaged.
The ejector is pinned.
Slidestop and grip safety are MIM. Hammer strut appears to be cast.
Hammer, sear and disconnect are MIM. Trigger shoe appears to be cast.
Trigger bow is straight and appears to be hard to within spec. Hammer
has a shelf instead of a captive half-cock notch. Bushing appears to
be machined steel. Clearance between bushing and slide is .002 inch. barrel to bushing is .003 inch. Could be better...Could be worse.
Extractor is barstock and tension was correctly set. Has Springfield
corrected the extractor issue of recent times? Time will tell.
Surprise! The disconnect was prepped/polished on the face and on the
48 degree angle on the backside. Nice touch, Springfield. The tops of the
sear spring legs were angled, but not polished. Trigger and disconnector reset were positive. All safeties were functional and correct. I stoned the
angle on the top and bottom of the trigger stirrup, polished the back, and stoned the tops of the sear legs smooth before reassembly. Also lightly
stoned the trigger bow on the corners, lengthwise to break the sharp edges.
Link pin is tight. Link is correct length and the vertical lockup is on the lower lug. Slidestop pin rubs the lug lightly as it breaks around the
front radius of the lower lug, and barely holds the pin off the radius
at the tangent. Dang near perfect.
Vertical barrel lockup is tight with no movement when pressed hard with at the hood the pistol in battery.
Prussian Blue dye on the lugs and three rounds fired indicates approximately 95% lug engagement with even contact on the faces. Linkdown timing is good, with .015 inch of clearance between slide and barrel at .250 inch slide travel.
Barrel throat is forward of the top of the ramp approximately .035 inch...
Perfect. Sharp edge at the top of the throat was lightly scraped and
polished.
Bore is clean and bright with sharp corners on the lands. Headspace
is within spec as checked with Go/No-Go gauges.
Three test rounds produced smooth chambering and positive ejection,
with slidelock on empty.
Tight schedule requires a standby at this point. I'll edit and add more
in a while.
Later on!
Edit: Closer exaination of the bushing after removing a little of the parkerizing revealed what appears to be a parting line. Cast?
Tuner
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