Search found 422 matches

by pjifl
Tue Feb 12, 2019 6:33 am
Forum: Equipment & Technical
Topic: Salt Bath Annealing
Replies: 7
Views: 470

Re: Salt Bath Annealing

Salt Bath heat treating of steel is a major use for this process. Many Salt mixtures traditionally used Cyanides. It a very reliable and efficient - especially for large numbers of items. But the temperature control in steel treatment are far more stringent and often go to much higher temperatures t...
by pjifl
Mon Jan 28, 2019 10:45 pm
Forum: General Forum
Topic: Maddco Barrel
Replies: 1
Views: 356

Re: Maddco Barrel

Similar experience with two 6.5 Madco barrels recently. Run in basically superfluous. And they both shoot very well.

Peter Smith.
by pjifl
Fri Jan 18, 2019 9:32 pm
Forum: Equipment & Technical
Topic: Jongmans action
Replies: 4
Views: 453

Re: Jongmans action

Quite a long time ago I was involved in fitting a peep sight to a Jongman's action shooting a 223. Although it shot fairly well (TR 223 back then) I also would not recommend it. I saw no broken lugs, but consider you can do a lot better with something else.

Peter Smith.
by pjifl
Fri Jan 18, 2019 7:19 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 55
Views: 2619

Re: throat angle

John, I neck turned when I started on a 284 because I borrowed a 310 thou reamer to get started. Previously I had lightly touched up some other calibre necks with a minimum clean up. Since then I have always considered it an unnecessary curse. My understanding is that it became regarded as necessary...
by pjifl
Wed Jan 16, 2019 6:42 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 55
Views: 2619

Re: throat angle

BTW, all of my 7mm SAUM (and 284W) are 9 twist except for a Kreiger I had at 8.5. In my opinion it was never as good as either my Bartlein or Madco barrels in 7mm although I know others have seen good results from them. I will eventually get onto the 7mm ELDs. I do not think I have seen any signific...
by pjifl
Wed Jan 16, 2019 4:12 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 55
Views: 2619

Re: throat angle

The 147 grain 6.5s in a 1 in 8 inch twist seems to perform OK. Hornady do mention this twist. I had wondered if faster would be needed but then there is more chance or burst projectiles. This is something I have seen with a tight barrel in a 6.5 if they are really pushed. The barrel was not bought w...
by pjifl
Wed Jan 16, 2019 1:12 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 55
Views: 2619

Re: throat angle

I have not had a tip fall out but another club member has had two. One happened in the box of projectiles, the other he showed to me - it had been loaded but in his bullet box a tip had fallen out. He is not trying to straighten any - they are seated with a quality seater. I would estimate that he h...
by pjifl
Tue Jan 15, 2019 5:33 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 55
Views: 2619

Re: throat angle

I am seeing some of the new Hornady ELD plastic tips fall out. Otherwise they seem a reasonable bullet and I have seen good scores with them. We did have a mystery miss with one, however, and I seriously suspect the projectile. It's a worry. That was a 6.5 147 grain ELD. It was hot but not being dri...
by pjifl
Mon Jan 14, 2019 10:09 pm
Forum: Equipment & Technical
Topic: Submerging barrels in cleaning solutions
Replies: 32
Views: 2189

Re: Submerging barrels in cleaning solutions

As an offshoot to this thread - and maybe it should be another thread. How does one test a product for barrel damage. It would be nice to have some protocol that was approved by barrel makers as a guideline for testing a products. I am thinking more about cleaning solutions and not abrasives here. I...
by pjifl
Sun Jan 13, 2019 11:49 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 55
Views: 2619

Re: throat angle

wsftr wrote Just out of curiosity can anyone point me to testing of a crooked chambering vs precision and improvement using jam. The theory of jam makes sense I just haven't seen any testing around it. Don't worry not asking for proof just curious if there is something in print I can read. Although ...
by pjifl
Sat Jan 12, 2019 10:19 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 55
Views: 2619

Re: throat angle

OK. I will come clean ! Originally I mainly shot a 6.5 Rogue. Usually with Lapua 139s but some SMKs. Always a Tangent Ogive. I dabbled with different jumps and favored about 20 to 30 thou but found it was very tolerant and this was the time I accidently applied 160 thou which also gave excellent res...
by pjifl
Sat Jan 12, 2019 4:26 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 55
Views: 2619

Re: throat angle

FWIW, a few years ago I shot a 7 SAUM in the NQRA Queens using Berger VLDs and about 20 thou jump. My X count was well above anyone elses. One was on the wrong target, however, which put me out of 1st place !!!!! At the time, the consensus was that VLDs would not do this in a SAUM and everyone was c...
by pjifl
Sat Jan 12, 2019 12:11 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 55
Views: 2619

Re: throat angle

One of the historic reasons for a jam is to partly counteract sloppy gunsmithing. I think barrel fitters working on target rifles are better these days but there have been many misaligned chambers cut. Of course, there are other reasons people use jump as a useful variable. It is well known that Fie...
by pjifl
Fri Jan 11, 2019 9:06 pm
Forum: Equipment & Technical
Topic: Abrasive cleaners and copper fouling
Replies: 31
Views: 1765

Re: Abrasive cleaners and copper fouling

Wal86 wrote Abrasives, are not the problem its the people using them incorrectly that is the issue... Certainly, I would agree that abrasives have a place and the damage is in the hands of the operator. BUT how does a newcomer know what is 'correct' or not ? The original KG2 used to kill this barrel...
by pjifl
Fri Jan 11, 2019 2:04 pm
Forum: Equipment & Technical
Topic: Abrasive cleaners and copper fouling
Replies: 31
Views: 1765

Re: Abrasive cleaners and copper fouling

Bruce, There is no doubt that the damage seen in the photographs is due to Bronze Brush bristles and an Abrasive. There may be additional damage due to a Plasma attack along the then formed grooves in some cases. Evidence (read the docs carefully) for this conclusion is from 1/ Barrels cleaned other...

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