One hole satterlee

[Seabeeken]

Did a satterlee test today with my 250AI and the 81 gr Shock Hammer over LT-32. The spread was 39.3 - 41.1 gr and even with that the rounds went into a ragged hole. This is a first for me. The flier was me. 6 in the hole the 7th was a flier and showed pressure signs so I stopped there.

 

[sierracharlie338]

The question is what does your velocity look like?

Nice shooting rifle either way! What are the specs

 

[74honker]

Yesh that's impressive! Now what lol. Guess you can't hardly go wrong with any of those. Pick the fastest one and retry?

 

[QuietTexan]

So if you have something in there with a decent ES/SD then you hit the tri-fecta of Satterlee, chrono, and seating depth all aligning at once .

Bare minimum forget the chrono and see what holds together at distance, you might have the widest barrel harmonic ever found.

 

[asd9055]

That's great! What distance was that?

 

[lancetkenyon]

I would assume this was at 100 yards.
Take it out to 400-600 and test again, seeing where you vertical dispersion leads you there.

 

[Seabeeken]

This was just 100. Ill extend it later. Im going to back the loads down a bit and shoot it again. The other powders I tested spread themselves out but this one didnt. Rifle is a Savage 110, 22" Preferred barrel 10T 5R, Boyds stock

 

[asd9055]

It's still great! But I would try at 300

 

[Deputy819]

Definitely looks like it may have some merit. Like @lancetkenyon said…distance will reveal the truth. I've shot many 1/4 minute groups at 200 yards only to have the chrony wipe the smile right off my face when it revealed an ES over 50 fps.

 

[338 dude]

Did a satterlee test today with my 250AI and the 81 gr Shock Hammer over LT-32. The spread was 39.3 - 41.1 gr and even with that the rounds went into a ragged hole. This is a first for me. The flier was me. 6 in the hole the 7th was a flier and showed pressure signs so I stopped there.
View attachment 337090

I've had the same thing happen to me only once two years ago when coming up with a Hunting load for my 3006 . 5 shots went into a perfect Cloverleaf but not only that it was already zeroed in my scope I had to touch absolutely nothing I never even chronograph the load because I don't care how fast is going

 

[Seabeeken]

Ive just never seen a group stay this tight across a 1.8 gr powder spread. They usually spread out, IME.

 

[BrentM]

Not uncommon. This is why I am not overly impressed with tight groups alone. Tight groups and low sd for long range, yes.

I generally like to shoot saterlee at 400-500. When I got my PRC I had a 2" group at 400 with a 150 fps es over 5 different charges. Wound that cartridge shoots everything really well so I'm guessing you are headed down that path too.

 

[Jon Bischof]

All the advice to redo your test at distance is good. I don't test any ammo at 100 yards anymore because results are much easier to interpret at 200. Otherwise you end up with one hole and you can't tell whether following shots went high, low or what.
My 200 yard targets tell me what I want to try at 400. Shooting at 100 is sometimes a waste of ammo with a good rifle because they are almost all one hole and you can't see the difference between the good and the better.

 

[Gibbshooter43]

Love those one hole results, but I really like the 250AI. It is such an effective caliber - easy to shoot and easy to load for. Very underrated!! Enjoy!