Hornady 140gr SST

[XcountryRider]

Anyone have any real world experience with the 140gr SST? What loading depth have you gotten and what MV have you experienced? I found and old post from 2012 where LRRPF52 is claiming 2315fps which i'm i'm thinking is a wag because he has 7 140gr bullets listed as 2315fps which is somewhat dubious. I was able to get 2450fps pretty easily with the 140gr Nosler BT. The SST looks almost identical to the Remmy 140gr Accutip and a quick test showed it could be loaded to 2.26 in my rifle which is better than the 140gr Nosler BT which i'm loading to 2.23. So in other words no reason to think the Nosler MV can't be matched or exceeded. If 2450fps can be achieved its a 500 yard hunting round before it drops below 1800fps. I'm not interested in what it "should" get but what you have actually experienced and measured.

[LRRPF52]

Bwild97 has experimented with a lot of 140gr class pills using a number of different powders. Work up from reasonable start loads and record your incremental changes in velocity with the chronograph to see where it departs from a linear curve.

[XcountryRider]

I ordered a box of the 140gr SST's i'll test them after this hunting trip. I leave tomorrow for a week in the Southern Sierra. When i get back at some point i'm load up the SST and the 140gr Remington Accutips and see how they compare. I'm thinking the Remington may have a thinner "nose cone" and can be seated a bit further out. We shall see. The plan is to start at 27gr in 2/10gr and move up to 28gr of AA2520.

[XcountryRider]

The Nosler 140gr BT on the left and Remmy Accutip 140gr on the right.

[Drifter]

The SST looks almost identical to the Remmy 140gr Accutip...

Supposedly, Hornady makes the AccuTip for Rem, and it's the same as the SST. The AccuTip-V is reportedly the V-max.

I read it on the internet, so it must be true.

[Tedward]

The Nosler 140gr BT on the left and Remmy Accutip 140gr on the right.

What the OAL of the Accutip and measurements to the start and end of the lands? I sent you the measurements of the 140SST's so we can compare.

[XcountryRider]

The Length of the accutip is 1.39 and i can load it to 2.26.

[XcountryRider]

Supposedly, Hornady makes the AccuTip for Rem, and it's the same as the SST. The AccuTip-V is reportedly the V-max.

I read it on the internet, so it must be true.

I googled it and looks like they are identical in the other calibers as well which i think gives it away. The SST is cheaper so why go with the accutip?

[XcountryRider]

My gauge was lieing to me on the SST. I created a dummy round and seated it and had to go all the way to 2.23 before the chamber liked it and it would chamber and would extract without sticking.

[XcountryRider]

The SST and Accutip look the same but the Accutip is skinnier at the tip allowing it to be loaded a little farther out. I created dummy loads for both to see where they would chamber and extract smoothly. The SST in my 18in stick has to be loaded to 2.23 but the Remmy Accutip can be loaded to 2.26. They look the same but are not the same bullet.

The SST and Accutip look the same but are not.


140gr Remmy Accutip can be loaded to 2.26 vs 2.23 for 140gr SST


140gr SST can only be loaded to 2.23 CAOL

[LRRPF52]

The SST is an InterLock type bullet with a plastic tip and a boat-tail base. It is a quick-expanding bullet with a very high ballistic coefficient (BC) for long range shooting, yet it incorporates a cannelure and the internal InterLock ring. It is offered in Hornady factory loads as well as to reloaders. Remington uses a similar Hornady produced bullet that they call "Accu-Tip" in selected Remington factory loads.

http://www.chuckhawks.com/hunting_bullet_guide2.htm

We often see manufacturing variations from lot-to-lot with bullets, which is why I prefer to keep away from the lands with some jump anyway. The moment someone comes up with a way to clone bullets, your phone and email will be bombarded by bullet-makers. Tolerances for bullet manufacturing have come a long way in the past few decades, but they are yet to be perfect.

[XcountryRider]

http://www.chuckhawks.com/hunting_bullet_guide2.htm

We often see manufacturing variations from lot-to-lot with bullets, which is why I prefer to keep away from the lands with some jump anyway. The moment someone comes up with a way to clone bullets, your phone and email will be bombarded by bullet-makers. Tolerances for bullet manufacturing have come a long way in the past few decades, but they are yet to be perfect.

It says they are similar to the SST and made by Hornady but it appears they are not the SST as some of us thought.

[XcountryRider]

Its hard to see in the pictures but the Remmy is thinner farther down the jacket. The SST is thicker farther up. They are very similar but are not the same bullet.

[cory]

Why do I always feel like a kid at christmas when I get a package from powdervalley, midway, joeboboutfitters, etc...?

So a couple boxes of Barnes 100gr TTSX and my box of Hornady 140gr SST bullest came in today. Immediately I pulled out my Hornady OAL gage and Oden (my 24" PF Grendel).

I grabbed my Nosler 140gr Btips to measure at the same time for reference.
140_SSTvsBTip.jpg

Bullet MAX OAL (in) Max COL (in)
Hornady 123gr SST 1.665 2.241
Nosler 123gr HPBT 1.709
Hornady 140gr SST 1.685 2.304
Nosler 140gr BTip(H) 1.724 2.268
Nosler 100gr Btip(H) 1.701 2.235
Barnes 100gr TTSX 1.729 2.274

My intended load work up.

OAL(in) COL(in) Brass Crimp Primer Powder Charge (gr)
1.670_____ 2.289 Hornady N CCI 450 CFE 223 29.8
1.670_____ 2.289 Hornady N CCI 450 CFE 223 30
1.670_____ 2.289 Hornady N CCI 450 CFE 223 30.2
1.670_____ 2.289 Hornady N CCI 450 CFE 223 30.4

At least that's the COL I want to use, I'll need to modify one of my magazines.

LRRPF52 I believe you've said your magazines will accept a 2.3 COL. Did you have to modify yours? If so is there a write up on how to do so properly?

30.2 is the point at which velocity started to level off for me in my Nosler 140gr BTip work up.

I'm going to start with CFE, but I've got a feeling these 140gr projectile are going to require a different powder to optimize them.

[XcountryRider]

Why do I always feel like a kid at christmas when I get a package from powdervalley, midway, joeboboutfitters, etc...?

So a couple boxes of Barnes 100gr TTSX and my box of Hornady 140gr SST bullest came in today. Immediately I pulled out my Hornady OAL gage and Oden (my 24" PF Grendel).

I grabbed my Nosler 140gr Btips to measure at the same time for reference.
[ATTACH=CONFIG]3995[/ATTACH]

Bullet MAX OAL (in) Max COL (in)
Hornady 123gr SST 1.665 2.241
Nosler 123gr HPBT 1.709
Hornady 140gr SST 1.685 2.304
Nosler 140gr BTip(H) 1.724 2.268
Nosler 100gr Btip(H) 1.701 2.235
Barnes 100gr TTSX 1.729 2.274

My intended load work up.

OAL(in) COL(in) Brass Crimp Primer Powder Charge (gr)
1.670_____ 2.289 Hornady N CCI 450 CFE 223 29.8
1.670_____ 2.289 Hornady N CCI 450 CFE 223 30
1.670_____ 2.289 Hornady N CCI 450 CFE 223 30.2
1.670_____ 2.289 Hornady N CCI 450 CFE 223 30.4

At least that's the COL I want to use, I'll need to modify one of my magazines.

LRRPF52 I believe you've said your magazines will accept a 2.3 COL. Did you have to modify yours? If so is there a write up on how to do so properly?

30.2 is the point at which velocity started to level off for me in my Nosler 140gr BTip work up.

I'm going to start with CFE, but I've got a feeling these 140gr projectile are going to require a different powder to optimize them.

Will your SST chamber when loaded to 2.289?