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gage pins instead of range rods? (Read 2788 times)

steel-pounder Full Member Offline Posts: 174 Joined: Mar 26^th, 2016	Re: gage pins instead of range rods? Reply #15 - Jul 24^th, 2022 at 9:13pm	Print Post
	[quote Steelpounder, I'll try to find the time to go through my loose pins and find you a 450+ and a 451- [/quote] thanks Dave appreciate it. thank you also to everyone who took the time to comment


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hepburnman Senior Forum Member Offline Posts: 402 Location: NJ Joined: Mar 22^nd, 2015	Re: gage pins instead of range rods? Reply #16 - Jul 26^th, 2022 at 12:02pm	Print Post
	I use a 1/10,000 reading long-pointed dial test indicator like an Interapids. No slop or looseness issues. Don't have to worry about damaging the rifling. You also measure right where you want to. Takes a little bit to get used to but not a big issue if your patience.


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steel-pounder Full Member Offline Posts: 174 Joined: Mar 26^th, 2016	Re: gage pins instead of range rods? Reply #17 - Jul 26^th, 2022 at 7:23pm	Print Post
	hepburnman wrote on Jul 26^th, 2022 at 12:02pm: I use a 1/10,000 reading long-pointed dial test indicator like an Interapids. No slop or looseness issues. Don't have to worry about damaging the rifling. You also measure right where you want to. Takes a little bit to get used to but not a big issue if your patience. so do you then just let it ride up on the lands and fall into the grooves?


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hepburnman Senior Forum Member Offline Posts: 402 Location: NJ Joined: Mar 22^nd, 2015	Re: gage pins instead of range rods? Reply #18 - Jul 27^th, 2022 at 9:42am	Print Post
	steel-pounder wrote on Jul 26^th, 2022 at 7:23pm: hepburnman wrote on Jul 26^th, 2022 at 12:02pm: I use a 1/10,000 reading long-pointed dial test indicator like an Interapids. No slop or looseness issues. Don't have to worry about damaging the rifling. You also measure right where you want to. Takes a little bit to get used to but not a big issue if your patience. Yes, the indicator point does ride up and over the lands. I also rely on getting the groove-circle concentric with the head-stock, and not the tops of the lands (bore-circle), as I feel the groove-circle has more influence on centering the bullet as compared to the bore-circle. so do you then just let it ride up on the lands and fall into the grooves?


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SBoomer Frequent Elocutionist Offline Posts: 1019 Location: Michigan's Frozen North (U.P.) Joined: Jan 28^th, 2010	Re: gage pins instead of range rods? Reply #19 - Jul 28^th, 2022 at 9:07am	Print Post
	“ Or heat up the barrel, and shrink it onto the tight pin, heat again to remove it.” Ive done this a couple of times. Safest way to heat the bbl is dipping the said end in 400deg vegetable oil for several minutes. Works great on press fit bearings too. The hot bearing literally drops onto the press fit shaft. fWIW….I saw no difference in accuracy with a non press fit pin trued barrel. When needing a steady rest collar on a finish blued barrel, Ive done the same with an aluminum collar heated up in oil.


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steel-pounder Full Member Offline Posts: 174 Joined: Mar 26^th, 2016	Re: gage pins instead of range rods? Reply #20 - Jul 28^th, 2022 at 12:11pm	Print Post
	Thank you Dave for the time and effort that you put into this. I really appreciate it. as for dialing in on the lands or grooves, this may or may not be the best way to do this, I dont know. to me it seems that a person would use the lands over the grooves but again it may or may not matter. however having the indicator jump the lands i think would get me all confused so I believe i will not be using this method.


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bobw Frequent Elocutionist Offline Posts: 1802 Location: NW, Iowa Joined: Mar 19^th, 2013	Re: gage pins instead of range rods? Reply #21 - Jul 28^th, 2022 at 12:49pm	Print Post
	In my Deltronic set are pins in 10ths and are not marked as +/-. I keep them all in my shop which is mosly kept at the same temp year round 69-70 degrees. I’m working on a straight bore 25-20SS barrel from BRC. At the muzzle a .2510 pin will not go in, .2500 pin goes in 2 inches. As I try .0001 increment pins the tight spot moves out. .2503 goes in 1.25 inches. The outer 1/2 inch had no change in tightness from .2507. So where does one cut it off? The length barrel I wanted was at the 1.25 inch spot so that’s were it is now. I don’t normally use these .0001 pin sets, normally .001 pins work, but decided to dig them out and see where I ended up, but is all this experiment did was bring up more questions!

	Robert Warren
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rkba2nd Frequent Elocutionist Offline Posts: 2010 Location: earth Joined: Feb 16^th, 2009	Re: gage pins instead of range rods? Reply #22 - Jul 28^th, 2022 at 3:03pm	Print Post
	bobw I would have to say, very often the case, kind of like a borescope!!

	rkba2nd
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steel-pounder Full Member Offline Posts: 174 Joined: Mar 26^th, 2016	Re: gage pins instead of range rods? Reply #23 - Jul 28^th, 2022 at 6:18pm	Print Post
	yep all very interesting and the cause of my original question. Is the largest gage pin that will go into the bore better than a range rod with a floating bushing and a slight taper than runs in snug for cutting threads? personally it seem to me this is where you want to be as close to perfect as possible. when it seems that the reamer is going ti have to follow the bore. the exception being if a person was to partially bore the chamber before using the reamer?


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