Originally Posted by
50calty
I'm not denying the increase of velocity with the increase of powder. But my chrony was collecting unburnt powder.
Next time you get a chance collect some of that black material that you find on your chrono, white sheet, or snow. Take it home and look at it closely with a mag glass - you will see that it no way resembles a BH-209 grain. It is burnt carbon being ejected out the barrel.
Luckly I had clear tape over the sensors. Thats why I'm wondering if the W209 primer isn't hot enough to burn all the powder. I'm sure your report is accurate and you didn't use W209. You used two of the hotest primers CCI and Federal. The two that Blackhorn recommends.
And the only reason I used them was to show that primer heat or power really does not reflect an increase in velocity or an increase in the ability of the powder to burn and create more pressure. I normally shoot a W209 as my base primer. If you look you will see that I even shot BH with a Remington 209-4 which is a primer that Remington use to make for the 410 shotgun, probably the weakest 209 made.
Maybe in the next week or two I can get back out and chrony 110 grains and 120 grains with both bullets. Keep shooting like I have been I'll be out of powder and bullets!
been there done that one also... that is exactly why I do not shoot BH-209 - to expensive for me.
mike