Ladder test

[MISSED]

This is my ladder test of the PPC

ppc 003 (Small).jpg (18.88 KiB) Viewed 431 times

ppc 012 (Small).jpg (28.74 KiB) Viewed 431 times

[Plowboy]

Thinking of doing on of these too in a hope to make load development a bit quicker. How do you go about these things?

[trevort]

how far and do you which shots were which loads

[MISSED]

100m and lowest to highest 25.8,26,26.2,26.4 26.8 and 27 of AR2207.
26.8 and 27 had sticky bolts so i would consider them to hot.

[Rinso]

100m is too close try 200m

[trevort]

I'm guessing you researched the powder choice? Sorry couldnt talk before. The tribe returned today!

[stinkitup]

Normally 200+ 300 400 even depending on what that rifle will be shot at and the data gets more usefull. I shot a ladder test at 100m with the 308 as couldn't get to the range at 200m and was almost useless.

Looks like she has potential though.

[MISSED]

Trevor,from what I was able to find out BM2, 2219 or 2206H seem to be the powders of choice when loading the 40 + grain projies.Todd Kindler in his Terrific Twenties book reached his top velocity and accuracy was very good with 2207.I also have BM2,2219 and 2206h but figured I should start somewhere.

Stinky I will give it a go at 200+m when I am on holidays which start on the long weekend in October .

[trevort]

or you could load five or ten around the charge in the middle and put them into one bigger hole, then load the rest of your cases and perforate brer rabbit

[stinkitup]

one good thing that still comes out of it and you don't waste too much ammo, powder and barrel life is you can find a safe max easily. My old Omark got to .1 grain under adi max and wasn't even sticky and no flat primers. So wasn't a huge waste of time. That and the spread of the 2grains went about 1" or 1 and 1/4 so was pretty happy with the old girl.

Just remember when you shoot it to make sure you know which shot is which if can have time go and mark each one not hard at 200m but when longer it does. I have seen guys and going to try it at longer range myself and colour the projectile in front of the ogive different perm pen colours which will mark the target.

Ryan

[Brad Y]

To be honest, its a varmint gun and can be used anywhere from 100-300m im guessing- maybe longer under good conditions. I personally would just load up what ever is shooting on the middle two shots and go do what trev suggests and just go pop some ferals. I dont see the benefit from doing it a 200 and 300m as your just allowing extra distance for a stray puff of wind to blow it around. If it bugholes at 100 then surely its not going to group more than 2 inches at 200. JMO- use that barrel for smacking bunnies rather than paper punching. It looks like its performing too well to waste it on paper.

[Rinso]

The ladder test is not about group size as such. It about finding the load with the least vertical.
Subsequent adjustment of seating depth usually renders a very accurate load with minimal to no vertical (at least in the load) Which means less misses due to unpredictable behaviour.
You can also determine max pressure etc along the way.

[Brad Y]

I did the further testing etc when I was playing with the F class rifle as yes I didnt want vertical at extended range, but this is only a varmint gun. I suppose its up to Andrew as to what he wants to do at the end of the day. Just something I really didnt bother about when its just a varmint gun. Now if he is going to shoot benchrest or fly semi seriously then go for it by all means.

[MISSED]

Brad you are right mate it is a bunny rifle but because of limited load data I was hoping to use the ladder test to find a load.Which I think I did.And if anyone was wondering how Noslers 34 grn shots projies shoot this was shot with them.

[Brad Y]

Far out they shot nice then. If your barrel is an 11 or a 10 twist it would be interesting to see how a ladder test with 40gr vmax went. Hopefully my pac nor will arrive soon and the playing with 40gr vmax in the 20 practical will start.