shooting flames? - what if anything does that indicate?

I was at an indoor range yesterday and noticed that quite a few of my reloads were shooting flames.   Does this indicate any issues with my reloading?

Fed multi-fired cases
CCI Lg P Primers
Magnus 811 185gr swaged SWC with light 45/45/10 added
N310 3.75gr
25 thousands of shoulder showing
0.468" crimp

The cases were sooty, but not bad.  I didn't have any unburned powder landing on the bench (as when i use Bullseye).  I was working from (what I seem to remember was) a N310 recipe from Cecil somewhere on here.

Don't ask me about accuracy, I was shooting them as if in competition 

To me that indicates that it was pretty dark in there. They will always shoot flame. 99% of the time you will not be able to see it.

Len

+1, shows you are keeping your eyes open.

Bump the charge up to about 3.85 gr of VV310.  Most people try to run too light with 310 and it can work, but its burning characteristics seem to get a little dirty and temperature sensitive at lower charge weights.  With 3.85 or so, I've never had any low temperature issues either.  

And that load works even better for 200 gr LSWC's.

CR

Shooting irons, I was taught that seeing the flame (outdoors in normal daylight) was a way to ensure you were really looking at the front sight throughout the shot. Seeing the flame indoors probably means it's dark!

increase crimp to .463

I figured I waited enough time to post this picture. You all know I have been itching all day to show it. James, I don't think a .463 crimp will do it. I used a heavy heavy roll crimp on this and it didn't help. You just think you have muzzle flash.

I like LenV's photo, I have similar effect in my S&W 27 with a 5 inch barrel, flames are not so bad with 2.7 grains of Bulleye and a 148 grain bullet but the flames are a bit more pronounced with a .357 case full of W296 and a 125 grain barrel.

How much is flames from the cylinder to barrel gap, hmm?

Here's a neat flame pix

james r chapman wrote:How much is flames from the cylinder to barrel gap, hmm?

It is ported. About half the blast goes out sideways. It would be scary if that was leakage.

was shooting at a local indoor range years ago, 
they have a cinderblock wall that splits the range in 1/2
apparently the wall had a good bit of unburnt powder that had adhered some how, and a guy lit up a 44mag, 
lots of muzzle flash, 
after a couple rounds the wall was burning, (well, actually the powder residue on the wall)

went out quickly, no harm to anything but a bit un nerving