300 Norma Mag Improved. Follow along!!!

My current 26" chambered barrel weighs in at 3lbs. This 29" unchambered blank barrel weighs in at 4.5lbs. Should add about exactly 1lb when it's cut to 27-28" (I haven't decided) and chambered. Perfect!!
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Awesome dude!!! Keep me posted how load development goes please!
Will do. It's going have good dose of 225 elm's for firing forming before it starts eating 245's and 220 or 230 Lazers. My plan is to spend Sunday forming 50 rounds and then filter some more in each range trip.
 
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Will do. It's going have good dose of 225 elm's for firing forming before it starts eating 245's and 220 and 230 Lazers. My plan is to spend Sunday forming 50 rounds and then filter some more in each range trip.
Sounds perfect to me!! I used an ice bucket and water with two towels and kept 3 minutes in between each round when I fire formed and it actually went fairly quick!
 
You guys talked me into it lol. They barely engage the case neck by maybe .05 when jammed into the lands. So I just seated them into the neck as deep as I felt comfortable, which is about .100 from JAM. That will be my starting longest seating depth. And then I'll go deeper from the there. Loaded up 15 with 93gr. N570 and a 215M. 92gr. really isn't showing any pressure signs with my 230's so 93gr. with these 220's should be fine 😅🤞🏽 lol. First picture is my starting seating depth. The tips are beautifully consistent also.
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Started the session with a 430 yard cold/dirty bore shot with my 230 hunting load. Then went to the 220's. A little over 3100fps, but they all pretty much shot like ****. Too much jump I'm pretty sure. Then ended the session with a 100 yard zero check with the 230's again. I'll be hunting with the 230's for sure.

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Started the session with a 430 yard cold/dirty bore shot with my 230 hunting load. Then went to the 220's. A little over 3100fps, but they all pretty much shot like ****. Too much jump I'm pretty sure. Then ended the session with a 100 yard zero check with the 230's again. I'll be hunting with the 230's for sure.

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We're you not able to get to the lands with the 220s? In my 264WMI they like to be in the lands.
 
We're you not able to get to the lands with the 220s? In my 264WMI they like to be in the lands.
No I wasn't. The freebore is too long. So I just seated them what looks like about .180" into the neck and went from there. I guess I could have ran them out to .125" but I'd like a little more bullet in the neck.
 
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