“The 22 Creedmoor Project”

[huntnful]

Tested 4831SC yesterday evening.

Ladder test looking for pressure.
41- 3054
42- 3120
43- 3180
44- 3308 flat primer. Easy bolt lift.


Then shot a 10 shot group with 42.5gr.



Then did some positional testing on what mid-height position is the fastest and most comfortable for me to get into. I’ve settled on kneeling with left down, right knee up. I then shot a 5 shot group from that position at 420 yards.

 

[Bluumoon]

Tested 4831SC yesterday evening.

Ladder test looking for pressure.
41- 3054
42- 3120
43- 3180
44- 3308 flat primer. Easy bolt lift.
View attachment 819399

Then shot a 10 shot group with 42.5gr.
View attachment 819401
View attachment 819402

Then did some positional testing on what mid-height position is the fastest and most comfortable for me to get into. I’ve settled on kneeling with left down, right knee up. I then shot a 5 shot group from that position at 420 yards.
View attachment 819403

Using what for rests while kneeling?

 

[huntnful]

Using what for rests while kneeling?

A hatch 27” bipod. Extended about 3/4 of the way. Then the toe of the stock is resting on my right knee.

 

[Bluumoon]

A hatch 27” bipod. Extended about 3/4 of the way. Then the toe of the stock is resting on my right knee.

Nice shooting

 

[silasbowhunter]

Tested 4831SC yesterday evening.

Ladder test looking for pressure.
41- 3054
42- 3120
43- 3180
44- 3308 flat primer. Easy bolt lift.
View attachment 819399

Then shot a 10 shot group with 42.5gr.
View attachment 819401
View attachment 819402

Then did some positional testing on what mid-height position is the fastest and most comfortable for me to get into. I’ve settled on kneeling with left down, right knee up. I then shot a 5 shot group from that position at 420 yards.
View attachment 819403

I don’t know anything about reloading, but why do you think there’s a larger increase in velocity from 43gr to 44gr than the rest of the increments?


Sent from my iPhone using Tapatalk

 

[huntnful]

I don’t know anything about reloading, but why do you think there’s a larger increase in velocity from 43gr to 44gr than the rest of the increments?


Sent from my iPhone using Tapatalk

Probably getting further into a pressure. Things seem to be more erratic and velocity sometimes jumps more per grain on the high end. 120fps is quite a bit though honestly. It’s not normally that drastic, even when you get into pressure.

I also don’t have a TON of experience with the small cartridges. A large jump like that might be more common when reaching pressure with the small cartridges.

 

[WKR]

Probably getting further into a pressure. Things seem to be more erratic and velocity sometimes jumps more per grain on the high end. 120fps is quite a bit though honestly. It’s not normally that drastic, even when you get into pressure.

I also don’t have a TON of experience with the small cartridges. A large jump like that might be more common when reaching pressure with the small cartridges.

Could you list all the powders you have pressure tested and where they maxed out at por favor?

 

[huntnful]

Could you list all the powders you have pressure tested and where they maxed out at por favor?

Only H4350 & H4831SC

24” barrel

4350 - 41gr. - 3400fps

4831 - 44gr. - 3300fps

That’s with an 80 ELDM. Both charges produced slightly flat primers, but bolt still lifted easy on virgin brass.

 

[WKR]

Only H4350 & H4831SC

4350 - 41gr.

4831 - 44gr.

That’s with an 80 ELDM. Both charges produced slightly flat primers, but bolt still lifted easy on virgin brass.

Speeds? And remind me your bbl length again?
I know it's a long ole bastard because you're in Cali

 

[huntnful]

Speeds? And remind me your bbl length again?
I know it's a long ole bastard because you're in Cali

Haha yeah I like long barrels. I updated the post with speeds and a 24” barrel

 

[HuntHarder]

Whst distance do you typically ladder test at?

 

[Harvey_NW]

Probably getting further into a pressure. Things seem to be more erratic and velocity sometimes jumps more per grain on the high end. 120fps is quite a bit though honestly. It’s not normally that drastic, even when you get into pressure.

I also don’t have a TON of experience with the small cartridges. A large jump like that might be more common when reaching pressure with the small cartridges.

I'd say you're right, less volume = more volatility.

 

[huntnful]

Whst distance do you typically ladder test at?

Just to find pressure, 100 yards.

I’ve attempted 600 yard smaller increment charge “tuning” ladders looking for a load with less vertical dispersion. But I simply can’t shoot the difference.

So now I just test bullets and powders at 600 yards looking for +- 1/2 MOA for 5 shots and see it repeat a few times. If it does that, it’s plenty good for any hunting I’ll ever do and also satisfies my personal level of precision that makes my brain happy lol

 

[Schmo]

@huntnful,
I know what you mean about not being able to shoot the difference at 600. Also, if I remember correctly, @Formidilosus said he’s never had a gun group bad at distance that has shot a good 10 shot group at 100. I’m not sure if this would be something that could be relied on, and a gun does need checked and trued at distance, but it would be interesting to see if there’s ever a time where a gun that shoots 10 shot groups great at 100, falls apart at distance.

 

[huntnful]

@huntnful,
I know what you mean about not being able to shoot the difference at 600. Also, if I remember correctly, @Formidilosus said he’s never had a gun group bad at distance that has shot a good 10 shot group at 100. I’m not sure if this would be something that could be relied on, and a gun does need checked and trued at distance, but it would be interesting to see if there’s ever a time where a gun that shoots 10 shot groups great at 100, falls apart at distance.

That’s definitely true. I actually just find it easier and more relaxing to shoot at distance. 600 yards seems like a happy medium to verify things to me.

 

[Harvey_NW]

@huntnful,
I know what you mean about not being able to shoot the difference at 600. Also, if I remember correctly, @Formidilosus said he’s never had a gun group bad at distance that has shot a good 10 shot group at 100. I’m not sure if this would be something that could be relied on, and a gun does need checked and trued at distance, but it would be interesting to see if there’s ever a time where a gun that shoots 10 shot groups great at 100, falls apart at distance.

Steve is just being humble and unconfrontational. In my opinion, he can shoot the difference, and is proving that those magical nodes don't actually exist. Dispersion is linear, if a gun shoots good at 100, it will shoot good at distance, with limitations being things like BC, stability, drag variability, and environmentals being accounted for. The problems all lie with small sample size.

I remember in one of the S2H podcasts featuring Form I was actually irritated because he was about to speak on the topic and Jake cut him off and the conversation spun. But I'm pretty sure he said he had never seen that, and was about to elaborate.

 

[HuntHarder]

Just to find pressure, 100 yards.

I’ve attempted 600 yard smaller increment charge “tuning” ladders looking for a load with less vertical dispersion. But I simply can’t shoot the difference.

So now I just test bullets and powders at 600 yards looking for +- 1/2 MOA for 5 shots and see it repeat a few times. If it does that, it’s plenty good for any hunting I’ll ever do and also satisfies my personal level of precision that makes my brain happy lol

Gotcha. That's exactly my experience too. I used to do ladder tests at 400 but after doing multiple 10 rd ladders, I noticed a lot of inconsistencies. Maybe my shooting or maybe a single ladder is not enough data to discern much of anything.

 

[HuntHarder]

That’s definitely true. I actually just find it easier and more relaxing to shoot at distance. 600 yards seems like a happy medium to verify things to me.

Showoff. 600 is a challenge for alot of guys. Clearly you are in the top percentile on this site. Your shooting is pretty damn impressive.

 

[huntnful]

Steve is just being humble and unconfrontational. In my opinion, he can shoot the difference, and is proving that those magical nodes don't actually exist. Dispersion is linear, if a gun shoots good at 100, it will shoot good at distance, with limitations being things like BC, stability, drag variability, and environmentals being accounted for. The problems all lie with small sample size.

I remember in one of the S2H podcasts featuring Form I was actually irritated because he was about to speak on the topic and Jake cut him off and the conversation spun. But I'm pretty sure he said he had never seen that, and was about to elaborate.

I mean, I can shoot some groups lol. But I’m not going to say whether or not there’s any possible existence of a charge weight node. I just can’t see it with my 11lb. Ultra super magnum supreme .

Multiple record holding BR shooters say there’s a charge node that induces less vertical dispersion. I believe them, but I can’t reliably prove it with my systems.

 

[huntnful]

Showoff. 600 is a challenge for alot of guys. Clearly you are in the top percentile on this site. Your shooting is pretty damn impressive.

Yeah but I’m just shooting for groups to see the dispersion, and they land wherever they land. I’m not pounding the bullseye every single time. With my setup, honestly anyone could shoot good groups at distance. It’s not special specifically to me. I take a bunch of people shooting and they all shoot good with a rock solid setup. As long as I have them dry fire a few times and not jerk the trigger lol.

Shooting the middle is MUCH harder, especially on the first wind call. That is actually a skill set.