300 win mag ladder test interpretation

[Joefrazell]

Looking for thoughts on where to go from here. This test was shot at 410 yards. The load is

Adg brass (new)
Cci250
225 eldm
Rl25

I know rl25 is temp sensitive. So trying to keep that in mind while development continues.

Weather was good
45-50 degrees, very slight breeze 2-3 mph

Primers started to flatten out at around 73 grains but nothing crazy. 74.6 had just a smudge of ejector mark. No heavy bolt lift. What I don't want to do is have pressure problems when it gets hotter out. Now, once the brass is fire formed I may be able to run it up towards that top node if I ever wanted to. I don't think it's worth worrying about trying to get my velocity higher then the 73.1-73.7 node. I think I'll stay in there. I think 2820-2840 range with this bullet will be great.

Not sure what happened to 72.2 unless that case just didn't have the volume? Not sure.

Anyone have any input? Am I looking at this right?

 

[lancetkenyon]

Where are you located, and what are your projected hunting temp ranges?
I like the high node myself, or the slow and low node. For targets, slow and low. For hunting, high node.

 

[Joefrazell]

Where are you located, and what are your projected hunting temp ranges?
I like the high node myself, or the slow and low node. For targets, slow and low. For hunting, high node.

I'm in Idaho. Temp swings can be pretty drastic. Id say when hunting my temps are anywhere from 25-55 degrees normally but I sometimes shoot in 80 degree weather. The rifle is gunna be used for banging steel and banging deer, elk and black bear.

 

[Len Backus]

Moved to RELOADING.

 

[25WSM]

Get some h1000 and be happy. I like the top node for sure too.
Shep

 

[Joefrazell]

Get some h1000 and be happy. I like the top node for sure too.
Shep

H1000 and my rifle don't get along unfortunately

 

[25WSM]

Dang the bad luck. Rl23 or 26 are both way more temp tolerant than 22 and 25. My 257 wbys love 22 and 25 but I was shocked how much speed they lost when hunting season got here. I went to 7828ssc and they do better now.

 

[Joefrazell]

I really want to try 26

 

[25WSM]

I get great speed from it but not the long-range accuracy. I've tried it in several 1000 yard comp guns I own and just couldn't get it to work.
Shep

 

[Joefrazell]

So I went back out. Loaded the exact same as before and went with 73.2 gr. Shot 14 shots. Shot 4 to zero at 100 and then shot steel at 851. My sd was 17 and my es was 69. I'm not really sure if I'll get that down until I get this brass fire formed and get my neck tension down a bit. Funny thing is my wife and I dominated the plate at 850 even with the es the way it was. Had one low and one high but the others were 1/2 moa vertical. Made one of my very best ever first round hits. Called 13 mph wind dialed help and center punched the dang thing! Thought about putting it up and going home so to not ruin it haha.

 

[Shane Lindsey]

Sometimes that's what you gotta do!

I try to do that once it gets closer to hunting season. One cold bore and one follow up... then move onto shooting other rifles.

 

[Mackinaw BOB]

I am currently working up a 225eld-m load. I'm using Sig brass, 7828Ssc out of a RPR. 300 win mag 71.5 grains loaded gave me a velocity of 2780-2800 with a ES of 20 and a 6 round group of 3/4 at 100 yards. This was new brass and the first load up I have tried with the 225. I think I can get it to improve with a little attention to detail

 

[Xescane]

I've been having really good luck with 200gr eldx and 72.5 gr of 7828ssc. No where near max pressure or speed but 0.3 moa is what matters to me. Smacking through a metal 5 gallon bucket at 900yrd over and over made it my load.

 

[Mc Fraser]

Looking for thoughts on where to go from here. This test was shot at 410 yards. The load is

Adg brass (new)
Cci250
225 eldm
Rl25

I know rl25 is temp sensitive. So trying to keep that in mind while development continues.

Weather was good
45-50 degrees, very slight breeze 2-3 mph

Primers started to flatten out at around 73 grains but nothing crazy. 74.6 had just a smudge of ejector mark. No heavy bolt lift. What I don't want to do is have pressure problems when it gets hotter out. Now, once the brass is fire formed I may be able to run it up towards that top node if I ever wanted to. I don't think it's worth worrying about trying to get my velocity higher then the 73.1-73.7 node. I think I'll stay in there. I think 2820-2840 range with this bullet will be great.

Not sure what happened to 72.2 unless that case just didn't have the volume? Not sure.

Anyone have any input? Am I looking at this right?

What do you use to identify bullet holes are 410yds? My biggest challenge is to match bullet holes with powder weight.