compression?

[beltfed]

Bruce ,
INdeed, you and I are overlapping in our exercise of compression of Swiss.

Now, I like your thought of the GRADIENT of DENSIFICATION
of the powder from top to bottom of the powder column.

How about this postulate:
The DENSIFICATION of the top of the powder column provides an
added resistance for the lower/denser powder near the flash hole
and so that lower powder hikes up the burn/pressure for the whole
column to burn better
beltfed/arnie

[Trigger1212]

Gents

Here’s a question: when compressing your powder do you compress the powder and then put the wad in or do you put the wad in and then compress?

Is there a specific reason for doing it one way or the other?

I’m currently using single .030 fiber Walters wads if that makes any difference. Thanks

Cheers!

Wade

[bruce m]

good question wade.
i have always compressed with the wad in.
reason is i never thought of your question
keep safe,
bruce.

[bruce m]

arnie, when you look at the low velocity s.d. achievable with black powder ammo compressed once, it would probably hard to beat that, and if you did the difference would be small.
considering s.d. of 4 fps can be expected normally, halving that to 2 is really no better.
keep safe,
bruce,

[beltfed]

Bruce, you are correct about sd of 4 may be good enough.
Probably so, considering all the other more significant variables
on the line at a match
( but what is really good enough?-depends on the game. Creedmoor? Sillywet?
the Quigley?)

My comments strayed a bit into speculation/theory on merits or
whatever on the gradient in density of the powder column
when we compress the whole column at once
vs what might change- good (or Bad?) if we were to compress
increments of the charge as we fill the case
beltfed/arnie

[beltfed]

Bruce, you are correct about sd of 4 may be good enough.
Probably so, considering all the other more significant variables
on the line at a match
( but what is really good enough?-depends on the game. Creedmoor? Sillywet?
the Quigley?)

My comments strayed a bit into speculation/theory on merits or
whatever on the gradient in density of the powder column
when we compress the whole column at once
vs what might change- good (or Bad?) if we were to compress
increments of the charge as we fill the case
beltfed/arnie

[Coltsmoke]

Trigger, you compress the powder with the wad to kill 3 birds with one stone. One, the powder is compressed, two, there is no powder stuck to the compression stem, three, the wad is in place. As far as good enough, when I can put ten .45 bullets in one hole that measures .460 at 200 yds. that will be good enough. Until then, I'll be working on equipment, load development, fouling control, spotting skills, and last but not least, honing my shooting abilities, that also includes offhand. If you are not doing all of the above you will stay where you are and be left in the dust as far as shooting competitions.

[Lumpy Grits]

I compress my E, 2F about .370-.390" with .060 fiber wad in place.
One of the most overlooked factors is bullet run-out.
If you run neck tension at all(I only shoot GG). You need to try and keep it to .003", T.I.R. or less.
Gary

[Kenny Wasserburger]

No, I do not enlarge the flash hole.


Use Winchesters WLR old white box primers...

Kw

[bruce m]

kenny,
some of us are not old enough to have those primers.
we have to make do with modern russian large rifle of fed large pistol match.
keep safe,
bruce.

[Kurt]

Nothing wrong with the Russian primers. They shoot good and were easy to find when everything else was gone. I still have one brick of the white box Winchester primers but they keep getting pushed back on the shelf reaching for others.

[Kodiak]

KW, glad you're enjoying those old Winchester primers!

Old Jim

[Lumpy Grits]

No, I do not enlarge the flash hole.


Use Winchesters WLR old white box primers...

Kw

I liked the white box winny's also.
Then I discovered CCI br2.
Have you tried the br2's?
Gary

[bruce m]

i have, but you cannot generalize.
2 rifles, and each prefers a different primer in a clear and definite way.
br2 is a good place to start, and might be where you could end up.
keep safe,
bruce.

[hepburnman]

I've used Fed 215 mag primers for almost 20 years for BPCRS. I have tried other primers and not found anything better even BR-2s. About the same accuracy. I think the 215 mag primers give me a slightly flatter trajectory. Perhaps it burns the powder faster or more completely. Don't know for sure.