Help me understand a flyer

[Remmy700]

Like at least run an expander mandrel to work out dings and ensure some what consistent neck tension?

 

[Jud96]

I always size Virgin brass just to get the necks trued up. I also do not do any load development until I have a least 20 pieces of once fired brass. Then I start working with those pieces. I've found the velocity difference from virgin to once fired can be anywhere from 15-50fps depending on cartridge and powder. You can't rely on the data you find with virgin brass.

 

[Remmy700]

Same. Virgin brass to me is just getting trigger time in. Results simply give u an area of interest to look once it's formed. Can also give u a really good idea of pressure ceiling for the particular powder/combo u are running

 

[Rick Richard]

In your firing sequence, when do you get the flyer or is it random?

 

[Colin78]

Did u do anything at all to this virgin brass?

Like at least run an expander mandrel to work out dings and ensure some what consistent neck tension?

I did. I set the die so it didn't bump the shoulder but made sure everything was true. And yes the expander ball ran thru neck.

I always size Virgin brass just to get the necks trued up. I also do not do any load development until I have a least 20 pieces of once fired brass. Then I start working with those pieces. I've found the velocity difference from virgin to once fired can be anywhere from 15-50fps depending on cartridge and powder. You can't rely on the data you find with virgin brass.

Same. Virgin brass to me is just getting trigger time in. Results simply give u an area of interest to look once it's formed. Can also give u a really good idea of pressure ceiling for the particular powder/combo u are running

I thought about that. I'm hoping I don't see too much change. But I will know shortly. I resisted some once fired and loaded them up to check.

 

[Jud96]

Same. Virgin brass to me is just getting trigger time in. Results simply give u an area of interest to look once it's formed. Can also give u a really good idea of pressure ceiling for the particular powder/combo u are running

I do the same thing with new brass. I just find pressure with about 20 cases. Then I take those and work up a load. When I find a good load, I load the virgin and fired brass with it. I'll shoot the new brass for practice and messing around until all the brass is fired. Then I'll get serious with practice and shooting distance.

 

[Colin78]

In your firing sequence, when do you get the flyer or is it random?

Random. Only shot 2 groups though. But yea on those 2 it was random.

 

[Colin78]

I do the same thing with new brass. I just find pressure with about 20 cases. Then I take those and work up a load. When I find a good load, I load the virgin and fired brass with it. I'll shoot the new brass for practice and messing around until all the brass is fired. Then I'll get serious with practice and shooting distance.

Great idea. Thanks for posting.

 

[Jud96]

I would revisit your powder charge tests. Find a node there. Then tune accuracy with your seating depth. Some bullets aren't very sensitive to jump, some are. It's beneficial to experiment with though.

 

[Remmy700]

I did. I set the die so it didn't bump the shoulder but made sure everything was true. And yes the expander ball ran thru neck.
Ditch the expander ball stuff, and get an expander mandrel. Why run a piece of brass thru a die just for an expander just to come back thru and wreck your previous efforts. What dies are u using






I thought about that. I'm hoping I don't see too much change. But I will know shortly. I resisted some once fired and loaded them up to check.

 

[Canhunter35]

Since ur using lapua brass, Id start with a simple primer switch then I'd try tweaking ur load by a .5gr probably down, U may be on the edge of the node.
The other option is the bullets are not consistent enough, but those flyers are wide enough I'd lean towards the load vs bullet consistency.
My 308 loads can use any kind of brass with respectable accuracy, but 46.5 of varget is a stiff load.
Es also isn't a great determiner of accuracy at short range ime

 

[Remmy700]

What is your logic of ES isn't a determining factor?

 

[L.Sherm]

Hes talking short range and I agree. If you run the numbers 20 fps equates to .5 at 500 yards

 

[Colin78]

Since ur using lapua brass, Id start with a simple primer switch then I'd try tweaking ur load by a .5gr probably down, U may be on the edge of the node.
The other option is the bullets are not consistent enough, but those flyers are wide enough I'd lean towards the load vs bullet consistency.
My 308 loads can use any kind of brass with respectable accuracy, but 46.5 of varget is a stiff load.
Es also isn't a great determiner of accuracy at short range ime

What is your logic of ES isn't a determining factor?

Hes talking short range and I agree. If you run the numbers 20 fps equates to .5 at 500 yards

So are y'all saying the 1 shot at .3 grain increments ladder test is not what I should be doing for load development for a 308 that I'm only going to be taking hunting shots at 500 yards or less? Because your right, I won't be shooting any deer past 500 with a 308 just not enough umph behind it at that range imo.