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Post by jayhawker on Feb 1, 2015 18:22:59 GMT -5
Yep, that's the wind on the KS plains.
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kabar
.240 Incinerator
Posts: 20 
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Post by kabar on Feb 1, 2015 22:58:52 GMT -5
Mr. Bradshaw:
I believe it's appropriate to reduce powder charges of H-110 by using enough powder to fill a case to the base of a bullet when deep seating. Am wondering if there is a formula for reducing a powder charge of HS-6 when doing the same. I have a couple of stock Ruger Bisleys chambered in .45 Colt which will not chamber LBT 300 grain LFNs sized to .452 when seated to the crimp groove.
Thanks,
Ken
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Post by bradshaw on Feb 2, 2015 2:10:52 GMT -5
Ken.... it would be good to measure your chamber throats with a caliper. You don't need the more accurate hole micrometer. You already know the exits are tight, since a cast .452" doesn't fit. Slug the bore also, not so much to measure groove diameter, but to feel on the second pass of the slug for tight and loose spots. A compression ring at frame/barrel juncture is sure to produce leading and degrade accuracy. Depending on the constriction, you'll have to hammer a pure lead egg sinker (or similar unalloyed slug) through the tight spot. Index the slug to the rifling for a second and third pass, which you may yet have to beat through if constriction is tight. For tapping a pure lead sinker through the bore I use a 3/8" hardwood dowel or brass rod wrapped in masking tape.
If you cannot thumb-press a jacketed .451 bullet through chamber exits, you may want to have the throats honed.
Deep Seat
I would start with 11 to 12 grains/HS-6----or two grains below your crimp groove load----under deep seated .452" 300 LFN. Seat to crimp high enough on ogive that crimping does not feel excessively hard.
David Bradshaw
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kabar
.240 Incinerator
Posts: 20
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Post by kabar on Feb 2, 2015 9:25:23 GMT -5
David:
Appreciate the information. Will give your suggestions a try.
Ken
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Post by tek4260 on Feb 2, 2015 9:45:01 GMT -5
Speaking of glare on the front sight, this is from my 625 with that ragged gold bead front sight. Through the group the light was changing from dark clouds passing in front of the sun. Definitely changed the "size" of the sight and also the POI  |
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Post by 2 Dogs on Feb 2, 2015 9:49:45 GMT -5
I bet if you yanked that bloody brass bead out of the front post that sixgun would be a one holer!
Using the top of the bead as a reference, if due to the light it "grows" then your shots will go low. Let a cloud come over and it "shrinks" and now you're shooting high. I hates em'!!
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Post by bradshaw on Feb 2, 2015 10:44:23 GMT -5
S&W presented me one of the first stainless M-629 .44 Mags in 1980. Came with subsequently discontinued serrated combat trigger (width between narrow and target). As presented at the Championship, the action was stiff. Roy Jinks asked if I wanted any changes when they engraved it to me. "Action job, please. With plain black rear sight blade and Patridge front with McGivern gold bead.
The gold bead was a mistake. Managed some good shooting with it. Mr. Man, it took work. First learned of the gold bead as a teen reading Ed McGivern's Fast & Fancy Revolver Shooting. The gold bead helps nail aerial targets. Did not like it for general marksmanship, nor hunting----for condemnation reasoned by Mr. 2 Dogs. Gold bead on a house gun, fine. Trail gun, negative.
We must continue this discussion another time. Specifically, how bright light pulls and sometimes pushes Point of Impact. Subject more complex for handgunner than for rifleman. Experience trumps science; science and engineering without shooting experience won't make the nut. We should walk that plank soon...
Meanwhile, snow descends heavily at 4-below ZERO. Unusual to see heavy snow fall during a hard cold. Mr. 2 Dogs bent my arm, forcing me yesterday to pluck the red ramp off the Ruger 03, pop in a black ramp.
Tried the black plastic ramp before the Super Bowl. Dusk, 160 paces offhand, 10-below ZERO. Shall send a few pictures to Lee to post.
David Bradshaw
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Post by 2 Dogs on Feb 2, 2015 12:07:50 GMT -5
Ah, the shadow knows.....
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Post by Ken O'Neill on Feb 2, 2015 17:39:46 GMT -5
I KNOW you guys know that a black undercut patridge is the best of all worlds. I just don't know why you keep fiiddling around with other substandard alternatives.  |
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Post by bradshaw on Feb 2, 2015 19:43:20 GMT -5
Ken.... and we know that you know the beautiful black shadow of a backswept scrotum hook front sight requires a holster with a deep sight track to carry it. Revolver thrust in a wide belt, pirate style, works well, so long as one is subtle on the draw and avoids climbing on and off equipment. Pirate style is how I packed the .357 Maximum early on. Note: pirate carry favors long barrels.
The MK II 5-1/2" and 5-1/4" pistols with back-draft front sights fit the M7 "tanker holster" made for the 1911. Muzzle barely protrudes. Almost perfect, except for the front sight hooking the holster's open muzzle. A bandoleer slung shoulder holster matches the Ruger auto's job as a companion. A half-inch longer would befit the delightful Ruger auto.
David Bradshaw
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Post by Ken O'Neill on Feb 2, 2015 20:03:24 GMT -5
My local holster maker Scott Ledford molds such a sight track in every holster he makes for me. No problem, at all. Our buddies Barranti and Leahy are also well acquainted with such niceties I'm sure, and my special El Paso Tanker easily accommodates my FAs with my undercut front sights. Designing the making of our holsters to accommodate such things is a small price to pay for being able to hit what we think we're aiming at. Anyway, that's my story and I'm sticking to it. Born and raised in Pittsburgh, I remember something about Pirates ... but no Pirate carry for me! Besides, It occurs to me that guys like 2Dogs and I are of such a well proportioned and perfect height, that if we were to attempt Pirate carry with a 10 1/2" Ruger, that hooked front sight would get caught in our shoe laces.  |
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Post by jayhawker on Feb 3, 2015 9:58:44 GMT -5
Mentioning the pirate carry brings to mind the late Andy Anderson's "Sidewinder" holster. An inside the pants/waistband holster, the belt loop was attached so that it would swivel freely. He received a US patent on this feature. It allows the gun to shift slightly with body movement, greatly increasing the comfort of a large handgun in the waistband. Anderson was quoted as saying that the old pirates carried multiple handguns with belt hooks on a bandolier, and this was his inspiration for the Sidewinder. He also told me that he sold many of them to TX Rangers, who bought one holster and multiple belt loops for different width belts.
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Post by oldschool on Feb 20, 2015 9:24:14 GMT -5
Anyone shooting a revolver the two calmer days had a near cake walk. Edna Huff and the present writer did their revolver work into a straight-flag wind that bent their Sierra .44 240 JHC's four to seven feet at 200 meters. Production shooters squeezing off .30-30's and .30 Herrett's watched their bullets bend two feet at most on the rams. (The 7mm TCU hit production in 1979. The 7mm International Rimmed and other slippery bottlenecks followed the 7mm TCU.) feet?!? Wow! One of these days we'll discuss exactly how sunlight affects Point of Impact. I have fits going between indoor and outdoor ranges. I usually sight in my revolvers outdoors, but when I go to the local indoor range, I usually have windage issues. I've learned to turn off the overhead lights in my lane for this reason. Although it doesn't fully correct my POI, it usually minimizes my windage shifts. |
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Post by bradshaw on Feb 20, 2015 11:09:21 GMT -5
oldschool.... here's a rule of Old School Riflery----Sun High=Shots High. To contrast sights and eliminate glare in gallery (indoor) shooting, only the target is illuminated. This has the added benefit of constricting one's pupils to increase depth-of-focus.
Windage
In general, sun at 9 o'clock pulls POI left----towards the sun. Sun flares on the left side of the front sight. To close the optical gap, the shooter subconsciously shifts the front left to balance the light between the sides of the front sight and the rear notch.
Elevation
Sun high=shots high. Glare atop the front sight obscures the top edge of the blade. To compensate, the shooter raises the front sight to optically "level" front and rear sights.
The rule sun high=shots high is no immutable. Flare in the rear notch may push the front sight----and POI----away from the sun.
Stringing
* a defect in one's eyesight may cause vertical stringing.
* a defect in one's eyesight may cause horizontal stringing.
Select, if at all possible, a windless overcast day to sight in. If the sun is bright on your sights, expect to shoot slightly lower under overcast conditions.
Rifle with open sights
A rifle or carbine with bead front sight and and U-notch or semi-buckhorn rear sight will shoot high in the dim light of dusk. Why? Under normal daylight shooting, theb bead nestles comfortably in the small rear notch. As the scene darkens, the front bead must be raised in order to see it. That raises POI. This rules applies to millions of Marlin and Winchester lever actions, and all rifles with a bead front and U-notch rear sight. It does not affect the post front inside the rear aperture of an M1 Garand.
David Bradshaw
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Post by bradshaw on Feb 22, 2015 12:18:43 GMT -5
Would be good to hear from anyone who, due to eyesight, tends to string shots vertically... or horizontally...
Observed----while spotting silhouetters----both types of stringing, and proved to my satisfaction flinch was not the problem. (Testing for flinch is the easiest to detect defect in all off marksmanship.) I've seen this stringing in International class shooters, among which it is not always present, and can be present under diffused neutral light. Obviously, bright sunlight and patchwork clouds aggravate tight POI hold.
Personal experience, particularly with remedy, may help a lot of shooters.
David Bradshaw
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