Thread: QuickLOAD just arrived!

Originally Posted by Robojaz

Now if you really want to get a headache then read Shockwave Theory -Rifle internal ballistics .
It talks about the use of accuracy nodes in Quickload to get a much better prediction of an accurate load.

Used it this weekend to calculate a new load for my 30-06. 1/2 MOA straight off the bat. No more ladders.

Ah yes, I know all about this I generally use this as a starting point in my load development. Its been a little hit or miss for me, and I always seem to need to alter the start pressure and/or burn rate in order to get the predicted velocity/barrel time to match up with real world velocity.

Originally Posted by ChrisW

Ah yes, I know all about this I generally use this as a starting point in my load development. Its been a little hit or miss for me, and I always seem to need to alter the start pressure and/or burn rate in order to get the predicted velocity/barrel time to match up with real world velocity.

And the problem I have is what is real world velocity?

The values my two chronographs return at 15ft are never remotely close to what the validated trajectory function in Strelok says it should be. This from the measured drops data.

In terms of accuracy down range, the Strelok number is always bang on, when it comes to hitting paper, gongs and small goats at 600m. If I used the chrono numbers and dialled according to that data, I'd miss every time.

I find with Quickoad that I really have to concentrate on every assumption, and when I get them all right (or very close to) I generally get a velocity output that matches Strelok.

I think some of the ADI powder data is a little off, I contacted Helmut and he admitted he hasn't tested them, he's tested the Hodgdon branded stuff. There are always differences batch to batch and I suspect some of the ADI burn rates etc are a little off. Not by a lot though.

When it comes to validating velocity, I'd suggest you go (a) Quickload, (b) chrono, (c) drops data, (d) Quickload adjustments, if required. Works for me.

Ok guys, thanks for the brotherly advice. I can see I've got a lot to study up on, which is kinda why I do this hobby so all good. And thanks for the tips on weighting factors and dodgy ADI numbers.

Originally Posted by Flyblown

And the problem I have is what is real world velocity?

The values my two chronographs return at 15ft are never remotely close to what the validated trajectory function in Strelok says it should be. This from the measured drops data.

In terms of accuracy down range, the Strelok number is always bang on, when it comes to hitting paper, gongs and small goats at 600m. If I used the chrono numbers and dialled according to that data, I'd miss every time.

I find with Quickoad that I really have to concentrate on every assumption, and when I get them all right (or very close to) I generally get a velocity output that matches Strelok.

I think some of the ADI powder data is a little off, I contacted Helmut and he admitted he hasn't tested them, he's tested the Hodgdon branded stuff. There are always differences batch to batch and I suspect some of the ADI burn rates etc are a little off. Not by a lot though.

When it comes to validating velocity, I'd suggest you go (a) Quickload, (b) chrono, (c) drops data, (d) Quickload adjustments, if required. Works for me.

With just using Strelok I find it pretty good, I have never had the spare cash for a Chrony of my own nor the very highly rated Quickload, but in 4 calibers I reload for Strelok gives repeatable "come ups" for every situation. once a bit of work has been done on drop validation.