Search found 731 matches

by Barry Davies
Sun Jan 13, 2019 4:26 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 52
Views: 1255

Re: throat angle

Do projectile designers actually perform tests with various shapes and various C of G's or do they simply design a projectile that " looks good " shape wise etc and say " well that should shoot " I am still convinced that the Sierra 2155 is more accurate than some of the later so...
by Barry Davies
Mon Jan 07, 2019 6:27 pm
Forum: Equipment & Technical
Topic: Abrasive cleaners and copper fouling
Replies: 31
Views: 1174

Re: Abrasive cleaners and copper fouling

That's why you " run in " a barrel -- to get rid of those micro scratches that are put in by lapping. If you do the run in and follow up properly, you smooth off any ( micro ) scratches that are in the barrel --result -- no, or minimal copper pick up. After " run in " and smoothi...
by Barry Davies
Mon Jan 07, 2019 5:13 pm
Forum: Equipment & Technical
Topic: Abrasive cleaners and copper fouling
Replies: 31
Views: 1174

Re: Abrasive cleaners and copper fouling

Any abrasive paste ( even the finest ) will put micro scratches on the barrel, which in turn pick up copper.
Solution--don't use abrasive paste --except in a case of " have to " ie a badly fouled barrel.
by Barry Davies
Sun Jan 06, 2019 7:14 am
Forum: General Forum
Topic: The Future
Replies: 145
Views: 12803

Re: The Future

Yes Bruce, Promote what we have. It's not difficult 9 pages of mostly waffle summed up in one post by Mr ? Potshot. Cold hard facts that seem to be too difficult to address, or, the capabilities to address are not there. You know, it took us better that 60 years to get the trigger pressure reduced t...
by Barry Davies
Tue Dec 25, 2018 10:16 am
Forum: Full-bore/Target Rifle
Topic: HBC 155.5
Replies: 20
Views: 3788

Re: HBC 155.5

G'day Phil.
15 thou off in one rifle 10 thou off in another.
Barry
by Barry Davies
Mon Dec 24, 2018 12:52 pm
Forum: Full-bore/Target Rifle
Topic: HBC 155.5
Replies: 20
Views: 3788

Re: HBC 155.5

Anecdotal evidence is not worth the paper it's not written on and requires taking with a grain of salt. If I had to fault any aspect of the HBC it would be the Base to ogive dimension, which to my way of thinking is a little too long, resulting in a more than necessary amount of the projectile withi...
by Barry Davies
Mon Dec 24, 2018 9:34 am
Forum: Full-bore/Target Rifle
Topic: HBC 155.5
Replies: 20
Views: 3788

Re: HBC 155.5

The HBC is of excellent quality. Having loaded many 1000's I found less that 1.5 thou variation in dimensions that matter with around 0.5 gn variation in weight, which is of little or no consequence. There is some ( up to 10 thou ) variation in ogive to base dimension from batch to batch, but again ...
by Barry Davies
Wed Dec 12, 2018 1:45 pm
Forum: General Forum
Topic: George Wittorff hunter class
Replies: 100
Views: 4808

Re: George Wittorff hunter class

My observations tend to indicate that there are two types of " hunting " rifles --The light weight rifle around 3 to 4 kg and the " tactical" hunting rifle at 5.5 to 6.5 kg . The " tactical" being somewhat different in construction and price to the plain old hunting rif...
by Barry Davies
Wed Dec 12, 2018 8:48 am
Forum: General Forum
Topic: George Wittorff hunter class
Replies: 100
Views: 4808

Re: George Wittorff hunter class

I really think that someone needs to clearly define what " Hunter " class is. I rather think an 8 kg rifle is not" Hunter" class but more in the" Target" rifle class. As far as " development " ( as mentioned by in the above post ) --how do you" Develop&qu...
by Barry Davies
Tue Nov 27, 2018 7:11 am
Forum: General Forum
Topic: NRAA Ammo Survey.
Replies: 39
Views: 2786

Re: NRAA Ammo Survey.

BC will vary the trajectory noticably more than velocity variations, unless of course the velocity variation is rather large.
More noticable at long range than short. Easily proven by calculation.
by Barry Davies
Mon Nov 26, 2018 2:55 pm
Forum: General Forum
Topic: NRAA Ammo Survey.
Replies: 39
Views: 2786

Re: NRAA Ammo Survey.

So noticeable isn't it - if you want to see it.
by Barry Davies
Mon Nov 26, 2018 7:58 am
Forum: General Forum
Topic: NRAA Ammo Survey.
Replies: 39
Views: 2786

Re: NRAA Ammo Survey.

Trev, I don't wish to be critical of the VRA as I know they are trying -- but-- $ 34 is about 65c per week. If I save one sighter per week I have saved more than that, and, it costs me double that amount to shoot every week. I get around the PM"s same as you and when I look around I don't see a...
by Barry Davies
Sun Nov 25, 2018 6:02 pm
Forum: General Forum
Topic: NRAA Ammo Survey.
Replies: 39
Views: 2786

Re: NRAA Ammo Survey.

Brad, What I mean by that is that there are numerous projectiles available that are NOT approved for use in FS and TR and I defy anybody to tell by simply looking at a loaded round if the projectile being used is in fact legal. Even when disassembled I doubt that a differentiation could be made betw...
by Barry Davies
Sun Nov 25, 2018 4:36 pm
Forum: General Forum
Topic: NRAA Ammo Survey.
Replies: 39
Views: 2786

Re: NRAA Ammo Survey.

Had the NRAA removed that projectile from the approved list, who do you think was going to enforce it? Rather naive to think that would happen. Simply shoot FO or F/TR --perfectly legal. Less people shooting PM's and Queens --just what the organization needs. The NRAA would have been way out of line...
by Barry Davies
Sat Nov 24, 2018 11:39 am
Forum: General Forum
Topic: NRAA Ammo Survey.
Replies: 39
Views: 2786

Re: NRAA Ammo Survey.

In addition to the NRAA levee per projectile, the states also add their margin. So how much mark up are we actually paying per projectile? The more you shoot, the more you pay, while some pay nothing. Of course shooters will source their components wherever they can at the cheapest price, ( and they...

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