Shooting Hornady's CX bullet for the first time! 270 WSM 

Yes, with IMR4350, being a single base propellent, you will get variations in velocity and group size as the temperature changes.. You can get some amazing loads with it, but it is a good idea to develop a hunting load at or approximately the same temperature as what you expect to be hunting in.

Looks like some good groups with them CXs. Enjoyed the video. I've always been intrigued by the 270 WSM. Keep em coming.

Scrap the ELD-X and keep working on the CX bullet. Do you have any slower burning powders? H4831SC, H1000, IMR 4831 or IMR 7828?

The H4350 variety of powder is supposed to be some of the most stable powder but I had never herd that IMR 4350 being that bad for being sensitive to temperature change

Cool. Follow up i was looking for. Be interesting, if possible, to pull those copper xp bullets and reload them to be more accurate. They look like, with that big red tip, they'd be good performers.

I thought it a little odd that you favored the 270 WSM over the 270 Weatherby in your other video. Now I see why. 😄

🙂 You got a Good Gun 🤗, with plenty of velocity to play with! 🔥However, the reloading manuals don't always do justice, especially to the Magnums, regarding "velocity potential"! I can't believe that you can't find any "virgin brass" on the shelves? Up here, I have seen plenty of Nosler Custom Brass, Including for the 270 WSM (If I'm Not Mistaken)! The only thing I am still having a hard time finding is primers (Especially Large Rifle Magnum Primers)! 😭 Only CCI's are available, but not the Federals that I prefer? 😠 I'm not sure what is going on with Federal? 🤷‍♂️

Always been a 270 WSM fan! I call it the original 6.5 PRC lol.

😎 I really like what you said about buying the 270 wsm! You didn't buy it to just get 270 Winchester Performance! Nope! You want to see what the rifle can really do! Sounds like so far, so good! 😜

I know IMR4350 isn't temp sensitive enough to cause an ES of 150fps over a 20° temperature change. from my experience, you could be seeing a few different things there. one of them could be because your barrel is new. I've noticed that for the first 150 to 200 rounds, the velocities can be pretty inconsistent. Bryan litz talks about this if you want to read what a professional has seen. the other thing that I believe you are seeing is the loads true numbers. you probably would have seen those numbers if you shot all those groups the same day. the third thing that could be contributing to the high ES's is the chronograph you are using. I know the photo style can give false readings fairly easy.

Yay first to comment lol

😎👍👍👍😎

I’m really liking the accuracy in the CX’s you are getting. I tried the 129 LRX’s and RL26 a few months back and it was horrible. I’ve had great luck with Magpro and H4350, so I’ll probably stay with those two powders in my 270 WSM. I do need to try my loads out with 145 ELD-X’s and Magpro.

I use to shoot with the regular powders...then I switched to the temperature insensitive powders ...I gained in velocity and my groups tightened up ...I had big shifts in point of impact....my way is take max charge and then -(minus) 2% and I write it out so I can see it on paper and for me then I load up 3 tp 5 rounds and I also write out the velocity extreme spread and standard deviation to look for a pattern. I usually notice there are two velocity and grouping nodes ..one lower and one higher then I also load in .2 grain around both nodes and then which ever groups tighter ...and is repeatable that is the one I go with ......yes you will shoot about 50 plus bullets possibly 100 .... But when you find the magic load ....you will shoot with confidence for every 100 yards or meters Cheers to all

I'd forget about the SD numbers. The sample size you are using is too small to get any valuable data from it. low SD and ES numbers can be a fluke when doing load development. I would be looking at group shape and size more so for load development and use ES to help confirm a load for the initial load development. when using book values for load development, you need to be looking at velocity more than the charge weight. velocity is the result of pressure. the max velocity they got in that book is at maximum pressure. powder can vary from lot to lot. that is where the discrepancy between. velocity and charge weight comes from.

My nosler book showing right at 3400 with 7828 if u can find some and can probably push closer to 3500 with a Lil playing great video

Where did you find brass for this cartridge? I’ve been looking at buying a 270 wsm for a while but brass seems to be so hard to find.

Have you tried 100 g cx?. I just did with superformace, gonna play with it a bit.. I don't have chronograph though so I don't have any data

Also keep in mind for some reason monolithic solids shoot better when the jacket fouling is cleaned out of the bore. When going to a copper bullet make sure the bore is clean.

120 CX are tack drivers in my creedmoor

I don't know what chronograph you use, but that can make a big difference from day to day based on sunlight and cloud cover. I quit using my Chrony because when using it with a magnetospeed the Chrony was way less consistent and off by as much as 120fps....