Drats! So a factory Anschutz barrel cleaned with a pull through patch and high quality cleaning oil after every use could last indefinitely?

I'll believe it when I see it....Innocent

BCloninger wrote:Drats! So a factory Anschutz barrel cleaned with a pull through patch and high quality cleaning oil after every use could last indefinitely?

Why would a pull-through patch made of weedeater line that gets gunk from the barrel on it and rubbing on the crown occasionally be a good thing? That's especially true considering getting the little melted ball on the end to be exactly the right size and perfectly round isn't every actually going to happen either.

This is a little like trying to separate the fly crap from the pepper... Bart Eaton once told me of a visit he made to Eley where he observed their 'culling' procedure for accuracy. In order to insure that Tenex would shoot in new OR old rifles, they tested with both. Four guns ranging in age from new to 400k rounds. Each 100k advanced the rifle closer to retirement at 400k, where a new one replaced it. These were shot every day for ACCURACY determination of the ammo... admittedly in a very controlled environment and conditions with the same lubricant and bullet alloy every shot. They don't clean them regularly. They don't clean them at all. Maybe that's why they last that long....

BCloninger wrote:Drats! So a factory Anschutz barrel cleaned with a pull through patch and high quality cleaning oil after every use could last indefinitely?

"Indefinitely" never stopped anyone here from spending $$$.

Steve
Do you think that the 4 R Shilen is less prone to wear than the conventional grooves and land pattern ?. I have a couple of them or order, and I am curious about the accuracy at 100 meters, I know they are killers at 50 yds. but have not had a chance to test one yet.
Is the Silica or glass bead residue from the primer compound something new in the quest for more accurate ammo ?. I never heard about it until resently.
Evelio.

Steve
Do you think that the 4 R Shilen is less prone to wear than the conventional grooves and land pattern ?.

No, not at all. But it seems to have the right geometry for superb accuracy. Their attention to detail when it comes to internal finishes and taper is very good, but no matter what name is on the barrel, I check each one very closely. Any maker can put out a less than desireable barrel. I'm OCD enough to not mind the extra work.

I have a couple of them or order, and I am curious about the accuracy at 100 meters, I know they are killers at 50 yds. but have not had a chance to test one yet.

They are outstanding, but so are many other rimfire barrels. Again, carefully measuring the uniformity of twist and taper will produce excellent results across the course. But, there is also the issue of properly tuning for such distances, and with that comes some lenghty range time for T&E. I have found no short cut for this.

Is the Silica or glass bead residue from the primer compound something new in the quest for more accurate ammo ?. I never heard about it until resently.

Silica is added to the priming mixture to assist in friction-based detonation / combustion. The actual type of silica is not discussed outside the factory, and there is alot of incorrect info about it on the net. Also, it is not in the shape of a "bead," but rather a jagged shape that is collects in clumps along with all the other residue.

If you read all of this info : http://en.wikipedia.org/wiki/Silica" you will see how it has been assumed for a long time that this is the culprit of barrel pitting and haze. I do still think it has a part in the process, but a much smaller one that was originally thought. I discussed it some in my first book.

Somthing else to consider, all the discussion about priming material, barrel wear, and ammunition are all topics that are generally "glossed over" by manufacturers. Often times when I am discussing an issue with Eley or CCI, they often start the discussion with " you cannot print this, and if you do, we will no longer work with you on anything."

The technology in these areas is a very closely guarded secret, and for the most part they just won't answer the questions.

So, I enjoy the discussion on the net, and I think it's fun to research, but there are times where I know what I have been told, directly from the ammo engineer, is not exactly the truth, but a slightly altered version. These people just can't take the risk of some things landing in print with their name attached to it.

Thus, there is speculation and research with the tools that we have, but there are some things that I just leave alone. Knowing the exact folmula of things itsn't that important to me personally.

s.

Lemme beat the horse just a bit more....

Barrel wear and life really needs to be seen in a new light. If your barrel is 26" long, as you fire round after round, the barrel does begin to wear. Removing cleaning techniques from the discussion, most of the wear is in the first few inches of the bore. Because it's a rimfire, flame errosion is not an issue. We have discussed some possible reasons of the pitting and haze, but that aside, it's still only in the first few inches.

With that said, setting the barrel back as little as 1/4" inch will restore nearly all of it's original accuracy. The majority of the barrel is still fine and does not need replacement. A new crown and chamber and you can keep using that same barrel for a very long time.

Shilen's new octagon barrel does show some indication of a much longer life span in terms of needing to set the barrel back, but it too has some disadvantages.

I also want to state that for some shooters, setting a barrel back is not possible for them - they need a gunsmith. So, it's not as easy as said. For me, we have our own maching shop so it's not such a big issue. Thus, when I say just pull the barrel and set it back, it's coming from my point of view where that's an easy (not fast) operation.

Steve
I understand your situation, keep us informed of any new development.
Thank you.
Evelio.

When I had my rifle built the Benchmark 2 groove barrels were winning an abundance of benchrest matches.

Steve
In my situation, setting a rifle barrel back is not a problem, but I agree is not something that everybody can do.
Would you mind expanding your opinion of the disadvantage of the octagon barrel ???
Evelio.

You guys win - will barter a 513-T and computer support for a new barrel...

BC, Last time I checked a 513 T did not need a computer to operate.

Innocent

Innocent wrote:BC, Last time I checked a 513 T did not need a computer to operate.

Innocent

Minor modifications were made. An updated users binder and software maintenance agreement are included...