| Users Online Now: 2,049 (Who's On?) | Visitors Today: 1,265,418 | |
| Pageviews Today: 1,728,326 | Threads Today: 440 | Posts Today: 7,297 |
| 01:48 PM | ||
| Users Online Now: 2,049 (Who's On?) | Visitors Today: 1,265,418 | |
| Pageviews Today: 1,728,326 | Threads Today: 440 | Posts Today: 7,297 |
| 01:48 PM | ||
I'm A Master Gunsmith - Ask Me Anything | |
| Anonymous Coward User ID: 73158164  United States01/21/2020 07:51 PM Report Abusive Post Report Copyright Violation | ... Quoting: Anonymous Coward 78289131 Why do some gun barrels seem to need 5-6 rounds through them (heating them of course) to settle back into a happy constant? For instance I was competing at the Nationals many moons ago using a Win. 300 mag. at 1000yds (Winbledon Cup Match) Unfortunately I ended up losing in a shoot-off with a 97-8X all because my rifle always needed 5 or more rounds down the barrel before settling back on zero. We were only allowed (if I remember correctly) 2 or 3 rounds to zero and then the match would begin and my biggest fear was that I had to start with a cold barrel. Praying for a miracle knowing my rifle had always slung out rounds at 2 o'clock when cold. I decided not to change windage and elevation and use only Kentucky windage. As a result I found that I underestimated a bit with my 1st shot for record an 8 at 2 o'clock, 2nd rnd was a 9 at 2 o'clock (now properly warmed) the remaining 7 shots all X's for a 97-8. I believe the winning score was a 98-4X. I never knew before hand that I would ever end up having to end up in a high level match that allowed for such a few number of sighter rounds. I've always looked back and wondered what the outcome would have been if I had used a different rifle than the one I used that had this particular and somewhat peculiar quirk? Question is,..Why are some gun barrels so sensitive to heat while others not so much? A cold barrel has a bigger cross section, and sounds like the rifling was causing it to spin out in that direction (up and to the right). When it heated up the barrel cross section got reduced enough to control the exit properly. Just a guess. Over cleaning with a bore brush maybe? Or just shot out? No these were military maintained by some of the best Gunsmiths on the planet. I was on the U.S. Marine Shooting Team then and our armorers had experience as Olympic Armorers. Its a 2 part equation so if it wasnt the gun... All barrels have this aspect to them. First, the oils in the barrel have to be shot out be the first rounds, and the inside of the barrel gets coated with a minute amount of burned powder dust. This residue makes a consistent barrel surface shot after shot.. Second, any tiny defect on the inside of the barrel will shave off a minute portion of the gild metal on the bullet. This will cause the bullet to be slightly out of kilter when leaving the barrel. After a few rounds, the tiny defects will get filled with gild metal, making a smooth bore. Heat dowss have an effect, but it is usually detrimental. As the temperature rises, internal strains in the barrel are relieved and the barrels shifts, spoiling the aim. This is why cryogenic treated barrels shoot straighter since they have a lot of these stress areas removed in the cryo process. |
| Anonymous Coward User ID: 77527651 United States01/21/2020 08:07 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 77884098 United States01/21/2020 08:11 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 78368859 United States01/21/2020 08:11 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 73158164 United States01/21/2020 08:12 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 78368859 United States01/21/2020 08:16 PM Report Abusive Post Report Copyright Violation | do you think you could make a single shot, zip gun, out of ceramic that would not be detected or caught on scanners, that you could fit several up your ass or something? and then pass them out to several people. you get 5 guys, each with 6 zip guns up their ass. that's 30 single shots. plus swallow a lot of bullets for a reload. |
| Anonymous Coward User ID: 78173554 United States01/21/2020 08:18 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 76782215 United States01/21/2020 08:20 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 77555432 United States01/21/2020 08:22 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 77527651 United States01/21/2020 08:23 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 69346555 United States01/21/2020 08:24 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 77505643 United States01/21/2020 08:30 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 73158164 United States01/21/2020 08:30 PM Report Abusive Post Report Copyright Violation | How does one get started in this line of work? IE, how and what are the steps that lead to Master Gunsmithing? I highly suggest you go and enroll in a gunsmithing school. [link to study.com (secure)] |
| Anonymous Coward User ID: 78050625 United States01/21/2020 08:31 PM Report Abusive Post Report Copyright Violation | Why do some gun barrels seem to need 5-6 rounds through them (heating them of course) to settle back into a happy constant? For instance I was competing at the Nationals many moons ago using a Win. 300 mag. at 1000yds (Winbledon Cup Match) Unfortunately I ended up losing in a shoot-off with a 97-8X all because my rifle always needed 5 or more rounds down the barrel before settling back on zero. We were only allowed (if I remember correctly) 2 or 3 rounds to zero and then the match would begin and my biggest fear was that I had to start with a cold barrel. Praying for a miracle knowing my rifle had always slung out rounds at 2 o'clock when cold. I decided not to change windage and elevation and use only Kentucky windage. As a result I found that I underestimated a bit with my 1st shot for record an 8 at 2 o'clock, 2nd rnd was a 9 at 2 o'clock (now properly warmed) the remaining 7 shots all X's for a 97-8. I believe the winning score was a 98-4X. I never knew before hand that I would ever end up having to end up in a high level match that allowed for such a few number of sighter rounds. I've always looked back and wondered what the outcome would have been if I had used a different rifle than the one I used that had this particular and somewhat peculiar quirk? Question is,..Why are some gun barrels so sensitive to heat while others not so much? I would cold fire then hot fire into a water tank and examine your lead rifling marks. The rounds may be too tight or the barrel is egged a bit, which can influence the bullet as it leaves the bore. |
| Anonymous Coward User ID: 76782215 United States01/21/2020 08:33 PM Report Abusive Post Report Copyright Violation | How does one get started in this line of work? IE, how and what are the steps that lead to Master Gunsmithing? I highly suggest you go and enroll in a gunsmithing school. [link to study.com (secure)] Wow, not many schools out there. Seems the way it's going for most trades these day. Thanks for the reply! |
| Anonymous Coward User ID: 73158164 United States01/21/2020 08:38 PM Report Abusive Post Report Copyright Violation | How does one get started in this line of work? IE, how and what are the steps that lead to Master Gunsmithing? I highly suggest you go and enroll in a gunsmithing school. [link to study.com (secure)] Wow, not many schools out there. Seems the way it's going for most trades these day. Thanks for the reply! if you want a actual degree, then it means Yavapai College. Highly respected. |
tkwasny
 User ID: 77839169 United States01/21/2020 08:39 PM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 73158164 United States01/21/2020 08:55 PM Report Abusive Post Report Copyright Violation | 12 gauge sabot in a smoothbore gets you a smaller spread pattern target at 50 yards, but not much farther. Rifled barrel with slug gets you out to 100 yards and a sabot helps narrow the spread. If you are in a open range area like a open field, then choose rifled for longer reach. If you routinely hunt in dense woods, a smoothbore works fine and saves the expense of a rifled barrel. |
| Anonymous Coward User ID: 76782215 United States01/21/2020 08:59 PM Report Abusive Post Report Copyright Violation | ... Quoting: Anonymous Coward 76782215 How does one get started in this line of work? IE, how and what are the steps that lead to Master Gunsmithing? I highly suggest you go and enroll in a gunsmithing school. [link to study.com (secure)] Wow, not many schools out there. Seems the way it's going for most trades these day. Thanks for the reply! if you want a actual degree, then it means Yavapai College. Highly respected. Well, I've already got a few degrees, not so much interested in paper as learning the skill, which I find fascinating. I guess I'd always assumed the majority of those in this business fell into it via family, or an apprenticeship, not so much community college courses. |
| Anonymous Coward User ID: 78369135 United States01/21/2020 09:02 PM Report Abusive Post Report Copyright Violation | I designed and created a 70 caliber revolver with 8 inch barrel called the Bosche Handcannon. Only 4 were ever made. very kewl sir! respect ! :) Hey Rewind. How's the new job going,? Liking the mountains? |
| Anonymous Coward User ID: 73158164 United States01/21/2020 09:11 PM Report Abusive Post Report Copyright Violation | Wow, not many schools out there. Seems the way it's going for most trades these day. Thanks for the reply! if you want a actual degree, then it means Yavapai College. Highly respected. Well, I've already got a few degrees, not so much interested in paper as learning the skill, which I find fascinating. I guess I'd always assumed the majority of those in this business fell into it via family, or an apprenticeship, not so much community college courses. As with everything these days, there are specialties. People will specialize in engraving, stocks and wood work, rebarreling, polishing and bluing (coatings), etc. Also, people specialize in types of guns, such as black powder, pistols, revolvers, shotguns, rifles, and antique guns. It takes many years to become proficient in all of the various disciplines. Then there are the other trades that need to be learned along the way to make it all work, such as machining (Lathe and mill), welding (tig and gas), heat treatment, metallurgy, strength of materials, hydrodynamics and the basic science of internal ballistics. On top of all this, if you want to do this to earn money, even if you work in someone else's shop, you need to know and thoroughly understand the state and Federal gun laws that apply to you and your work so you don't accidentally "step over the line" |
| seekinginformation
User ID: 78362585 United States01/21/2020 09:22 PM  Report Abusive Post Report Copyright Violation | |
| Crunch62
User ID: 40543914 United States01/21/2020 09:41 PM Report Abusive Post Report Copyright Violation | I have a JC Higgins shotgun from around 1965. Quoting: Anonymous Coward 77408960 Why does it not have a serial number? Could be like sears and cooey they did not have them as they were so cheap and mass produced like air guns that it was not considered important for a very long time. Long guns were not required to have serial numbers until after the Gun Control Act of 1968. I have a couple older guns with no serial numbers. I've been married so long, I don't even look both ways when I cross the street. |
