Painless load development (mine)

[Castle Rock]

Both probably, the 107 may get you a bit more speed due to less bearing length, but I would back off a bit on the next loading if I was you

 

[HuntHarder]

So virgin brass can handle a bit more with out showing pressure? Or am I past pressure due to velocity?

I'd back off a grain or more. You have ejector marks on Virgin brass. On once fired, your bolt is likely to be a stiff open, if it isn't already.

 

[huntsd]

I'd back off a grain or more. You have ejector marks on Virgin brass. On once fired, your bolt is likely to be a stiff open, if it isn't already.

Are you taking about the circle on the “w”

 

[HairyScandinavian]

So virgin brass can handle a bit more with out showing pressure? Or am I past pressure due to velocity?

You may already know all this but this helped me a lot recently. https://primalrights.com/information/understanding-pressure

 

[HuntHarder]

Are you taking about the circle on the “w”

Yeah, flattened primer, ejector marks on Virgin brass is usually a no go for me. I have had to drop 1.5 grains on once fired brass if I was already seeing signs on Virgin. I now make a point to have no real signs of pressure on virgin brass. It just doesn't leave you much room error.

 

[HairyScandinavian]

Are you taking about the circle on the “w”

Kinda looks like a wee raised lip around the firing pin strike, whatever they call that.

 

[huntnful]

Yeah, I probably credit cartridge too much when a lot of it is good blank, machined well, and good components = shoots tight. My buddy just got a benchmark and a bartlein chambered in 260 rem from same smith and they both hammer. This one is a krieger.

For sure man. I don't necessarily disagree with you at all either. I've just seen a lot of random bullshit cartridges with basically zero data shoot really good too. And they would have shot substantially better yet if the guns weighed 5 more pounds. Your groups are certainly exceptional though, but I do think more of the precision comes from component choices and build specs, before the actual chamber selection itself. Those 144's sure are a great shooting bullet. I may hunt with them this year. They put a hell of a hole in a couple coyotes and a coues buck last time I tested them.

 

[huntsd]

Kinda looks like a wee raised lip around the firing pin strike, whatever they call that.

Yeah, flattened primer, ejector marks on Virgin brass is usually a no go for me. I have had to drop 1.5 grains on once fired brass if I was already seeing signs on Virgin. I now make a point to have no real signs of pressure on virgin brass. It just doesn't leave you much room error.

Both probably, the 107 may get you a bit more speed due to less bearing length, but I would back off a bit on the next loading if I was you

All thanks for the feedback. Did some reading and looks like I was over pressure on 116. But am I missing something on my 2 107 loads to show over pressure?

 

[huntnful]

Doesn't look like it has a favorite. . Damn son!

Yeah this one is going to be ZERO issues lol.

Better ocw, ladder, and seating depth test that one to make sure you’re not leaving anything on the table..

Hahaha that’s the next step. Should have 10 rounds left of barrel life when I start REALLY honing in on it .

I’m just going to shoot 144’s and H1000 until season gets closer, and then pull out the fire

 

[wind gypsy]

All thanks for the feedback. Did some reading and looks like I was over pressure on 116. But am I missing something on my 2 107 loads to show over pressure?

Nothing obvious just looking at those pictures. Like others said, trying to find pressure on virgin brass isn't going to do you any favors. Some of that energy is going into expanding your brass and subsequent firings tend to show sticky bolt lift a little sooner.

What is the barrel length? Velocity should be a fair sanity check. Those velocities dont seem out of sorts depending on barrel length.

 

[jdvangeystel]

I'd back off a grain or more. You have ejector marks on Virgin brass. On once fired, your bolt is likely to be a stiff open, if it isn't already.

This isn’t always true- you can get ejector marks on virgin brass well below pressure depending on what your chamber looks like and how much your brass is growing- if you are moving that shoulder out a bunch and having a lot of brass flow you will get an ejector mark- or if you have a really tight chambered neck and moderate brass flow, you will get an ejector mark- ejector marks on virgin brass can mean a lot of different things and it isn’t always a sign of pressure- now on fire formed brass, with a .002 shoulder bump and not a bunch of brass flow, on a rifle without any sharp edges on the ejector relief, absolutely an ejector mark is a sign of pressure- but just an extractor mark alone on virgin brass doesn’t always really tell you you’re at pressure, it just doesn’t, there are far too many other variables there on virgin brass


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[huntsd]

Nothing obvious just looking at those pictures. Like others said, trying to find pressure on virgin brass isn't going to do you any favors. Some of that energy is going into expanding your brass and subsequent firings tend to show sticky bolt lift a little sooner.

What is the barrel length? Velocity should be a fair sanity check. Those velocities dont seem out of sorts depending on barrel length.

20”. Book max is as follows

24” barrel
107 2800
108 3015 fps