Printable View
I get 2650 fps from 168s and 2720 fps from the 175s out of 26" barrels. Haven't shot or chrono'ed any 155s yet. Only played with the ballistics on them. There's a bunch of info on then on Sniperside though.
I just like the 175 load too much to change at this point.
To tell you the truth I have problems with the 168's past 800. I have not looked into the 175's or 155's but with 168 grain A-Max projectiles traveling at 2750 fps I can hit anything I want out to 800 and after that I don't know what happens, but I am all over the place. I would need to put up a huge ass target out there and fire 10 - 20 rounds at it to see if there is just something that I am doing wrong or if the bullets are key-holing. I guess it could be the wind at that distance, but it is really hard to tell when you don't hit the target at all and no one can give you an accurate mark where the round hit relative to the target.
If I were to guess I would say the 175's are a better bet because they will buck the wind better and take a little of that out of the equation so that you can focus a little more on other variables.
Its not the weight that matters but the BC . run the 155's if they shoot if not then the 175's . With the shorter barrel the 155 will maximize the velocity and the BC of the two is effectively the same .
Ditch the TAC and go to Varget , it is too temp sensitive and will give vertical impact variance with the temp changes . Win brass , BR2's , and 44 ish grains of Varget with the 175 and 46 ish with the 155 .
the problem with the 155's is they are so damned expensive. 175's really aren't too bad. if i am changing my loads completely, anyone interested in around 800 nosler 168 bthp bullets and 8 pound of unopened tac? :)
Powder Valley has both the 175 and 155 SMk's in stock and there is only around 4 bucks difference between the 2 in the 500 count box .
Really? Everywhere I've looked they are pricey. Any advantage really to having the 155 over the 175?Quote:
Originally Posted by C Ward
Same BC with more velocity = less drop and less wind . I wouldn't get a big box to start they may not shoot in your gun . Haven't seen one yet that wouldn't shoot them . When I've shot up the 175's I have I'm switching to the 155's . Make sure it is the NEW 155 SMK Sierra just changed the profile and the BC this year and some of the old ones are still out there , the NEW part number ends in 6 IIRC .
I do both 168gr and 175gr.
168gr I use at 100 to 600.. maybe 700 yards depending on conditions.
175gr for anything pass 700 yards...
...big difference between the 2 in rough conditions (winds pass 10 mph, etc...) pass 800 yards, and hate to waste good 175gr inside 500 yards despite any type of weather condition.
I love stretching'em legs of them 175gr... I tried going out 1400 yards in 20 mph winds one day.. no luck, but I was close though [Coffee] I was able to hit 1200 yards... that's the farthest for me so far with 175gr (1 hit out of 10 shots) [Beer]
1400 with a 175 is right in the trans sonic area depending on muzzle velocity and they become pretty unpredictable in that area .
especially in high winds [ROFL1]Quote:
Originally Posted by C Ward
I was feeling so lucky... I must've went through 20 to 30+ rounds...
.... but nope... not one hit [LOL]