The 25 sst...up and running

I've had some 75gr Hammer hunters for awhile now but just got around to testing them today. Pulled the 25sst out of the safe blew the dust off cleaned it up and mounted a scope back on then did a pressure test.

26" bbl
1&7"
90*
CBTO 2.173
COAL 2.592" -.001
NT .002"
Fed210
ADG 2X
75gr HH
Bbl round count 1,301
Magneto speed

H4350

58 3930 clean cold bore
59 3961
60 4074 ej mark
60.5 4091 ej mark sticky extraction

Interestingly enough 60gr of h4350 is where I saw my first ej mark when testing the 90gr absolute hammers as well. But they were running 3796 fps, 278 fps slower.

In short what inspired me to pull this back out and test lighter bullets is I have waged war with the coyotes! I've never been a cat guy, but in my area I have a lot of rats and rattle snakes. The snakes love to hang out on my porch in the mornings right by the door to so you get a nice wake up scare when you walk out the door in the mornings and the rats crap every where and chew wires up. Anyways I've started collecting barns cats and letting ppl drop off stray kittens. And now no more rats and snakes but the coyotes pick the younger cats off non stop. So I worked up a load in my fav truck gun, the tikka 243win 16" Bbl pushing moly'd 55gr Nosler ballistic tips at a mild 3,615fps. With a 100 yard zero it drops 6-7" at 300 yards and has been working great. But over time the coyotes have gotten smarter and I just have a lot of open country around me so it's not uncommon for them to stay out past 300 yards and they never stay still long so ranging and getting back on them is very hard.

So I started thinking I want something flatter shooting, in comes the 25sst. I've got a few rounds loaded up with 58gr/75hh That I'm going to test once the sun drops a little more this evening and if accuracy is ok il see what the drop is at 300 yards and how it compares. And I also want to see the drop of the 90gr AH's to when I have more time. And then there's this dream I have to keep ignoring where I build a 6SST running 55gr HH's at 4600 fps just holding over on fur at 500 yards slaying coyotes by the pack! I have to say the wheels have been turning lately when it comes to flat shooting cartridges.
 
I've had some 75gr Hammer hunters for awhile now but just got around to testing them today. Pulled the 25sst out of the safe blew the dust off cleaned it up and mounted a scope back on then did a pressure test.

26" bbl
1&7"
90*
CBTO 2.173
COAL 2.592" -.001
NT .002"
Fed210
ADG 2X
75gr HH
Bbl round count 1,301
Magneto speed

H4350

58 3930 clean cold bore
59 3961
60 4074 ej mark
60.5 4091 ej mark sticky extraction

Interestingly enough 60gr of h4350 is where I saw my first ej mark when testing the 90gr absolute hammers as well. But they were running 3796 fps, 278 fps slower.

In short what inspired me to pull this back out and test lighter bullets is I have waged war with the coyotes! I've never been a cat guy, but in my area I have a lot of rats and rattle snakes. The snakes love to hang out on my porch in the mornings right by the door to so you get a nice wake up scare when you walk out the door in the mornings and the rats crap every where and chew wires up. Anyways I've started collecting barns cats and letting ppl drop off stray kittens. And now no more rats and snakes but the coyotes pick the younger cats off non stop. So I worked up a load in my fav truck gun, the tikka 243win 16" Bbl pushing moly'd 55gr Nosler ballistic tips at a mild 3,615fps. With a 100 yard zero it drops 6-7" at 300 yards and has been working great. But over time the coyotes have gotten smarter and I just have a lot of open country around me so it's not uncommon for them to stay out past 300 yards and they never stay still long so ranging and getting back on them is very hard.

So I started thinking I want something flatter shooting, in comes the 25sst. I've got a few rounds loaded up with 58gr/75hh That I'm going to test once the sun drops a little more this evening and if accuracy is ok il see what the drop is at 300 yards and how it compares. And I also want to see the drop of the 90gr AH's to when I have more time. And then there's this dream I have to keep ignoring where I build a 6SST running 55gr HH's at 4600 fps just holding over on fur at 500 yards slaying coyotes by the pack! I have to say the wheels have been turning lately when it comes to flat shooting cartridges.
I love it!
 
Shot 3 at 100 yards with 58gr. First 2 were touching then the 3rd as expected now was a flyer, the shots marked with a sharpie were from pressure testing/dialing in with the magneto attached. I then loaded 2 more and adjusted .5moa up to roughly confirm 100 yd zero then shot 2 at 300 yards.

I shot 2 different poa's so I could know which was my cold bore shot. Started left to right, first was 4.4" low second was 4.1" low at 300 yards.

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Went out this evening to test the drop of the 90gr absolutes hammers compared to the 75 HH's.

I wanted things to be somewhat equal with both loads. I saw an ej mark at 60gr of H4350 with both bullets so I dropped 2 grs down to 58. Yesterday was the first time trying the 75s and they shot ok right at the start with 58 at 3930 fps. My standard load with the 90gr AH's has been 59gr of h4350 but today I dropped it down to 58 and shot 2 shot groups starting with 58 then 58.2 then 57.8 which was less than 1/2 moa so I went with that jammed .-001" in the lands just like the 75s. 57.8gr with the 90s gave me 3753 fps. I then shot a few more times until I was satisfied with my 100 yard zero for the 90s.

Set up my target at 300 yards and fired 2 shots. To my surprise the 90s dropped significantly less than the 75s despite going 177 fps slower. While it was only 2 shots they measured .28" coming out to .08MOA.
So the 75HH's had 4.2" of drop at 300 yards and the 90gr AH's have only 2.5" of drop! I have also shot these 90s out to 800 yards in the past and the have done well and had less drop than the 131aces.

Pic is with the 75HH,90AH, and 131 ACE

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Sister in law did it again with the 25sst…. Her best yet! 545yds with the obsolete blackjack.
 

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