Shot my first load development, results not great

[358WCF]

Shooterdevil,

Another thought on uncontrollable variables...

Was the rifle brand new when you started these tests? New barrels seem to speed up over the 1st 100-200 rounds. Smarter people than me have noticed this. The only new rifle I have actual chrono data for was also a new Ruger 6.5CM during a 1/2-assed break-in period. Over a period of 2 weeks, in the same type of weather & temps, using the same lot of factory ammo, it increased c.150fps over the 1st 100 or so rounds before stabilizing.

That & small sample size... & maybe high expectations for your first foray into load development (the old loose screw behind the trigger syndrome). It happens. Small groups in the above mentioned Ruger were an exercise in frustration until I played with seating depth. Welcome to the rabbit hole.

Maybe this was mentioned already. I've only skimmed thru all the posts.

 

[RabbitSlayer]

You are upset about SDs of 10 for your first load development? There is nothing wrong...I been loading a few years and those numbers ain't easy to achieve.

I also learned all from youtube. I basically follow erik cortina's instructions.

Seriously though. You are watching YouTubers who been reloading for decades, are gunsmiths, and or national champions. They are also shooting custom guns that cost 10k + and have more invested in reloading than I have in my house. Sorry to break it to you, your ruger isnt going to agg .0s and .1s and you are unlikely to have an SD of 2 for 100 shots lol. You are doing great. A good shooter could win a prs match with those SDs...