Search results

Search the forum Search Articles
  1. I

    Lapua lot testing and barrel wear question

    Looks like the US Gov has an easier method than pins. Same idea though. Someone better tell them they aren't checking cylindricity. PS: I could be wrong about the cause of throat wear. Thought that was right but maybe not.
  2. I

    Lapua lot testing and barrel wear question

    I don't see where Justin cares or would benefit from actual hole size or cylindricity or perpendicularity or runout or parallelism or, or, or, or. A pin gages the effective hole size. AND, it will gage the effective wear. It's pretty cut and dry. Why would you throw in something like...
  3. I

    Lapua lot testing and barrel wear question

    Last thought for Justin and I have to get back to work for the day. In centerfire cartridges, it's believed that throat wear is largely a function of the powder kernels and combustion particles having a sandblasting effect. The more powder versus bore diameter, the more the wear. Extreme...
  4. I

    Lapua lot testing and barrel wear question

    You got it Justin. If you go this route, what you will find is on a fresh barrel, the "next size up" pin will not go with very light pressure. It's important not to press it in so it sticks. As the throat wears, it will create a tapered worn leade off the cut leade. Your next size up pin...
  5. I

    Lapua lot testing and barrel wear question

    I have not measured the bore of a 22LR. Centerfire throat erosion was a very obvious process that was known well and could be seen easily with a borescope. I'd recommend the Deltronic pin set for your land diameter if you really want to measure it. There are other more complex means using...
  6. I

    Lapua lot testing and barrel wear question

    On a constructive note for Justin – The most practical means I can think of for you to accurately measure barrel wear is by using the Deltronics pins Tim mentioned earlier. I know AGrizz came back with this response: “Using a Deltonic Pin in a barrel is like sticking your dick in old Haggie...
  7. I

    Lapua lot testing and barrel wear question

    Back to the rifle bore measuring thing… The first two links AGrizz provided for the “gun barrel gage”, is for a relatively crude comparative tool. Think of it like using calipers to measure something you really need micrometers for. The tool locates off the top of the lands on one side of the...
  8. I

    Lapua lot testing and barrel wear question

    CRPS – If I may, I have some suggestions that may help you in your testing. I agree with what grauhanen is saying about if it doesn’t shoot at short range, it won’t shoot at long range. I also think I understand the results you are looking to see at distance and why. The biggest thing that jumps...
  9. I

    Lapua lot testing and barrel wear question

    LOL Grizz. Nevermind. You've never measured a rifle bore. You don't know what you don't know... But some of us do.
  10. I

    Lapua lot testing and barrel wear question

    Thanks for the perspective. It's sometimes hard to filter out the noise. The limitation with air gages in rifle bores had to do with custom shape tools needed to be made to account for the rifling, then, the air gage would show a change in airflow indicating a larger or smaller condition but...
  11. I

    Lapua lot testing and barrel wear question

    Not sure what your problem is AGrizz. You attacked Tim with things I stated so I assume you are attacking me too. Your link to cnc air gage blah blah blah means what exactly? Do you really think the inspection of a near perfectly round cylinder with an air gage compares to a rifle bore with...
  12. I

    Lapua lot testing and barrel wear question

    I'm not going to try to convince anyone here of anything. But - I have a strong background in centerfire benchrest, gunsmithing, precision machining and metrology. Most of what Tim has been saying is a matter of fact. I understand the passion of chasing a set of beliefs to the end and I am a...
  13. I

    Where to get ammo now post

    SK Standard Plus at Midsouth right now...
  14. I

    Vudoo with CCI SV ??

    From centerfire benchrest testing, it is pretty well accepted that your barrel muzzle is vibrating mainly in the vertical direction and your load and atmospheric conditions determine the timing of bullet exit. If your muzzle is moving upward, the faster bullet will print lower on the target...
  15. I

    Liberty safe trouble

    I had a very similar issue with my Liberty safe when it was new. I'm guessing that was about 12 years ago. Has a keypad very similar to yours. Anyway, I was all bent out of shape over it until the locksmith came and replaced some parts. It's been problem free since. I'd buy the same safe...
  16. I

    Latest map of Virginia 2A counties.

    Wouldn't it be more accurate and informative if you colored the "support" counties red since they more than likely don't and won't have your back politically? Don't get me wrong, I'd like to see it all green myself but what use is wishful thinking?
  17. I

    Latest map of Virginia 2A counties.

    You might as well post a map now that is 100% green because you won't have a single county say they are not going to abide by the constitution. My problem with the map is it is misleading as to the actual political climate. False positives.
  18. I

    Latest map of Virginia 2A counties.

    https://www.suffolknewsherald.com/2019/12/18/council-passes-constitutional-city-resolution/
  19. I

    Latest map of Virginia 2A counties.

    My understanding was 2A sanctuaries are stating no more infringements. And, again, isn't the governor claiming 2A support and constitutionality? I was told by a person at the Suffolk meeting the counsel basically said good luck in Richmond and you are on your own.
  20. I

    Latest map of Virginia 2A counties.

    Suffolk did not go 2A Sanctuary from what I was told. They put forth a resolution claiming they support the second amendment and would uphold the constitution. Isn't that the same thing the governor is saying? I don't think these maps being posted should be mixing "support" counties in with...
Top Bottom
Back
Home
Forums
Merch
Alerts