For both of them step in .3 gr increments.

Need 3 colors, that very much contrast. I use blue, yellow, red.

Spotting scope won't see 500 yard holes accurately enough.

Shoot 3 in a row, then go to the paper, and label. That gives cool time. Feel the barrel when you get back. If it feels warmer than ambient temps, wait on it to cool more. All of this is dictated by cartridge, barrel thickness, and ambient temps.

THREAD OVER

Thanks Patriot.

I don't do ladder test the conventional way anymore. What I do is still load up in increments but instead of looking at groups I slap the magneto speed on and look for the flat spot in the velocity chart. After that I pick a charge in the middle of that node and check groups. Tweak oal after that if need be.

I don't do ladder test the conventional way anymore. What I do is still load up in increments but instead of looking at groups I slap the magneto speed on and look for the flat spot in the velocity chart. After that I pick a charge in the middle of that node and check groups. Tweak oal after that if need be.

How has this worked so far? I just bought one for fun and was gonna attempt this.

Ex just was involved in load workup for 7MM/PRC off the 6.5 case. First ladder moderate speeds and low pressure signs so another ladder and 175’s at 2905 was the spot from a 22 inch barrel.

I do both at the same time. I setup a target at 335yds as that happens to be the most convenient and put a camera on it and also use the Labradar to check velocity.

If I have lots of data to go by my ladders are only small 4-5 charge weights. I mean do you really need to start your ladder for a 6.5 Creedmoor /140gr with H4350 at 39.0 gr when you know you re not going to be satisfied running 2600fps.
If I don’t find a spot on the higher end I move on to a different powder/ bullet combo but that rarely happens.

Now if it’s something new cartridge wise or wildcat or new powder and there’s not info then yes by all means be conservative and it may take a big ladder charge wise to get where you want to go.
Ex just was involved in load workup for 7MM/PRC off the 6.5 case. First ladder moderate speeds and low pressure signs so another ladder and 175’s at 2905 was the spot from a 22 inch barrel.

This was a recent target on a Creedmoor loaded two of each and ran two back to back 4 shot ladders.

Pay no attention to the numbers as I didn’t try to number just used colors.... not even sure how the 3 and 4 got on there? My flat spot was the green and yellow.