Search found 434 matches

by pjifl
Sun Mar 24, 2019 8:09 pm
Forum: Equipment & Technical
Topic: Is my scope Broke ?
Replies: 17
Views: 671

Re: Is my scope Broke ?

Rich4, A boresighter is almost useless in this role. It is equivalent to about a 4X Riflescope at its best. The Astronomical Telescope + special Graticule is by far the best. I will write more on this but am very tired at the moment after driving back home through Rain after shooting today. Peter Sm...
by pjifl
Sat Mar 23, 2019 8:47 pm
Forum: Equipment & Technical
Topic: Is my scope Broke ?
Replies: 17
Views: 671

Re: Is my scope Broke ?

Rich4 wrote I assumed you were using the adjustments of the second scope to measure to, would a cheap scope with Mildots do? Objectives together? Do they need to be centred to each other perfectly? Might be perfect for squeezing doubts from my head, Thanks Rich Yes. Preferably want about 40X but fa...
by pjifl
Sat Mar 23, 2019 2:05 pm
Forum: Equipment & Technical
Topic: Is my scope Broke ?
Replies: 17
Views: 671

Re: Is my scope Broke ?

Just to test tracking and run a box test without firing a shot, the test scope need not be perfect. Once it is more or less centred, you then never move it during a test. Only the zoom and knob tracking on the scope under test need be changed. Another thing not fully appreciated - you do not need ex...
by pjifl
Sat Mar 23, 2019 8:43 am
Forum: Equipment & Technical
Topic: Is my scope Broke ?
Replies: 17
Views: 671

Re: Is my scope Broke ?

You can make a Collimator of sorts using another Riflescope if you are interested. The basic principle is to have one scope look into another face to face. It is not up to a dedicated Collimator but it does work. Take a substantial piece of RHS steel and screw onto it two Pic Rails for the scopes. T...
by pjifl
Fri Mar 15, 2019 6:33 pm
Forum: Equipment & Technical
Topic: NECK CLERANCE - IS IT IMPORTANT?
Replies: 34
Views: 1573

Re: NECK CLERANCE - IS IT IMPORTANT?

Just for completeness, I will mention that a very light skim is actually harder than a definite neck turning job. An interrupted cut on Cartridge Brass is difficult to do and control well. For anyone who has not done this, make sure that you have a very rigid setup, a razor sharp tool, and realize t...
by pjifl
Fri Mar 15, 2019 12:05 pm
Forum: Equipment & Technical
Topic: NECK CLERANCE - IS IT IMPORTANT?
Replies: 34
Views: 1573

Re: NECK CLERANCE - IS IT IMPORTANT?

Yes - some short range BR shooters use a neck clearance such that one never needs a die when reloading. Just remember, however, that 1/ At short range, velocity variation if far less important. 2/ Many are proud of the fact that they only need a dozen extremely select cases at a competition and relo...
by pjifl
Thu Mar 14, 2019 3:38 pm
Forum: Equipment & Technical
Topic: NECK CLERANCE - IS IT IMPORTANT?
Replies: 34
Views: 1573

Re: NECK CLERANCE - IS IT IMPORTANT?

I have never met a newcomer who fully appreciates just how easy it is to degrade good cases with inadequate attention to detail during neck turning. Most agree that, if neck turning standards are perfect, brass fired in a perfect chamber/barrel will have few or no problems. Even with very fine clear...
by pjifl
Thu Mar 14, 2019 10:14 am
Forum: Equipment & Technical
Topic: Grains or grams?
Replies: 23
Views: 2131

Re: Grains or grams?

I do not understand how this topic can result in any disagreement. Put simply, the resolution of the scales simply needs to be better than the mass of one kernel of powder whatever unit you use. In Grams, this is about 0.0017 grams or 1.7 milligrams for 2209 powder. Scales resolving to better than 1...
by pjifl
Thu Mar 14, 2019 10:04 am
Forum: Equipment & Technical
Topic: Bullet flight
Replies: 5
Views: 411

Re: Bullet flight

I recently discussed this video with a few people. It is interesting but :- More slow motion videos tracking shells show something different. https://www.youtube.com/watch?v=vluzeaVvpU0 This is more about the development of slow motion cameras in general but it does show some shells in flight. Ignor...
by pjifl
Sat Mar 09, 2019 5:27 pm
Forum: Equipment & Technical
Topic: If ballistics is a science ....
Replies: 42
Views: 1733

Re: If ballistics is a science ....

I believe that a thin coating of grease is more likely to minimize corrosion between bullet and neck than Graphite. I used to use Graphite but have changed. I understand how people are afraid to use grease because one must wipe out all excess and leave only a tiny thin film behind. It is not the pro...
by pjifl
Sat Mar 09, 2019 9:41 am
Forum: Equipment & Technical
Topic: If ballistics is a science ....
Replies: 42
Views: 1733

Re: If ballistics is a science ....

Trevor wrote Running the risk of lightly greasing the inside of the necks and having powder sticking to it, wouldn't it be easier to lube the projectile? I don't think it would be as easy to get consistency and one would need to guarantee no grease was on the rest of the body of the projectile but ...
by pjifl
Sat Mar 09, 2019 9:14 am
Forum: Equipment & Technical
Topic: If ballistics is a science ....
Replies: 42
Views: 1733

Re: If ballistics is a science ....

It is easy to become blinkered wrt to one or two 'rituals' during loading and forget that many factors influence the final accuracy. Assessing all and ranking them in importance is the secret. Do not waste time on the less important things. They may become important but only if you have successfully...
by pjifl
Tue Feb 26, 2019 11:13 pm
Forum: Equipment & Technical
Topic: 22 wild cat
Replies: 14
Views: 589

Re: 22 wild cat

I played with a 22 PPC through a 1 in 8 inch twist barrel using 80 grainers.
Extremely accurate at the short ranges but I have never used it for decades. Really not sure why I built it ??????

Peter Smith
by pjifl
Tue Feb 12, 2019 6:33 am
Forum: Equipment & Technical
Topic: Salt Bath Annealing
Replies: 7
Views: 602

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: Equipment & Technical
Topic: Maddco Barrel
Replies: 1
Views: 466

Re: Maddco Barrel

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

Peter Smith.

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