do primers affect muzzle flash?


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gofastman
September 12, 2011, 03:49 PM
I found my 10mm target loads have a MASSIVE muzzle flash, and while it is fun im wondering if there is something I can do about it, just for the sake of experimentation.


the load in question:
165gr fmj
10gr longshot
WLP primers

would a cci 350 or 300 change the flash output either way on this load?

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Walkalong
September 12, 2011, 03:53 PM
Change powders. Primers have little to nothing to do with muzzle flash.

gofastman
September 12, 2011, 03:58 PM
don't they change the pressure of the round? wouldn't this change how quickly the powder gets ignited?

rcmodel
September 12, 2011, 03:58 PM
Hodgdon doesn't even list Long-Shot use in 10mm till you get up to 180 grain and heavier bullets.

I think not only are you using a bunch of it, but the light bullet isn't providing enough resistance to get a good burn.

I agree you need to change powders, at least to one recommended by the powder manufacture.

rc

Walkalong
September 12, 2011, 04:12 PM
If the powder is not burning well in that application, a primer change won't fix it.

Get a powder suitable for 10MM that is treated to reduce muzzle flash. :)

gofastman
September 12, 2011, 05:46 PM
If the powder is not burning well in that application, a primer change won't fix it.
why not?
again:
don't they change the pressure of the round? wouldn't this change how quickly the powder gets ignited?

I'm not interested in changing powder, this stuff works well.
the flash isn't a problem, I'm just curious because I'm new to this reloading thing

Walkalong
September 12, 2011, 07:28 PM
A large charge of slow burning powder will give muzzle flash (It also comes out of the cylinder gap). The only thing that can help muzzle flash is to go with less of a faster powder, which may not give the oomph and velocity desired, and or use a powder treated with a flash suppressant.

The primer is a very small part of the equation. WLP primers are fairly hot, but try another primer. Prove it to yourself. :)

gofastman
September 12, 2011, 08:26 PM
A large charge of slow burning powder will give muzzle flash (It also comes out of the cylinder gap). The only thing that can help muzzle flash is to go with less of a faster powder, which may not give the oomph and velocity desired, and or use a powder treated with a flash suppressant.

The primer is a very small part of the equation. WLP primers are fairly hot, but try another primer. Prove it to yourself.
ok, well im still gonna change it, like you said-prove it to myself, for science ;)
is there a flash suppressant additive out there?

what magnum (10mm, 44mag) powders offer the least flash?

Walkalong
September 12, 2011, 09:59 PM
I do not load 10MM, so I can not answer that one. N110 has very little flash in .44 Mag. AA #9 isn't too bad, but N110 flash is next to nothing.

for science
Yes.

jeffreybehr
September 13, 2011, 12:48 AM
I've posted about this so often I figured everyone is tired of it, and then there are 9 messages that don't mention my research. I did this for all of us, guys; pass the word.

http://jeffreybehr.zenfolio.com/p548446203

Short answer--Longshot...
http://jeffreybehr.zenfolio.com/p548446203/h3afd9578#h5313906
...is the culprit. And I don't know, but I doubt changing primers would cause a visible change in MF.

Here's a pic of MF developed to enhance your viewing pleasure.
http://i89.photobucket.com/albums/k220/jeffreybehr/Shooting%20stuff/Muzzleflashspecial_1280w.jpg

ArchAngelCD
September 13, 2011, 06:21 AM
Primer strength has very little effect on pressure for the most part. Yes a magnum primer will aid in a more complete burr and a better ignition of hard to ignite ball powders like W296 or HS-6 but that's due to the slightly longer and hotter burn of the magnum primer. In most cases it's the powder that causes excessive flash.

I also don't load for the 10mm but a few friends do. They really like AA#7 in the 10mm and from everything I've seen it produces very little muzzle flash. I'm a fan of Longshot but no powder can do everything and even if it works well there can be trade-offs. (like excessive flash because it's a shotgun powder)

gofastman
September 13, 2011, 07:10 PM
Accurate #7, SR4756, Super Field, and Universal

Out of those listed, would #7 generally give the best velocities?

Walkalong
September 13, 2011, 08:21 PM
In Speer #14 #7 is tops with a 155 (2nd is 3N37 which is low flash), 3rd behind Blue Dot and 2400 with 180's, and 4th with 200's. AA #9 is tops with 200's. This is SPeer #14, and they do not give pressures, just the velocity and charge where they stopped.

627PCFan
September 13, 2011, 08:38 PM
I loaded longshot in my 12ga for a while experimenting with hevishot. We called it LOUDSHOT, I cant imagine how deafening that must be in your 10mm

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