Berger 6.5mm 156 gr. bullets. . .where are they???

Worked up in my .260 AI, with compareable pressures it looks like they are roughly only 50 fps behind the 147 eld-m's. I will likely be running them at 2900ish with my final loads, maybe a touch more.
Man, that's a lot of velocity you're trying to squeeze out of a 260?
 
codyadams has some fast barrels.
Are you doing the HBN coating on your 260 AI as well Cody?
Yup, HBN coated. A 30" barrel helps quite a bit too....

I'm doing a work up in a Ruger M77 Hawkeye predator 6.5 creed with uncoated 156's as well, trying both H4350 and RL26. I know RL 26 will be faster, but we will see how much. It's a 24" barrel, if I get over 2700 with h4350 I will be happy. Not sure what to expect from RL26 on this. To get them to fit in the mag (2.880" COAL to reliably feed) I'm jumping about .095", so we will see if they shoot well.

Also have a 7.5 twist 26" .264 WM with some loaded up using retumbo, hoping to break 3100 without pressure. But we will see what the magneto speed says in a few days.
 
Yup, HBN coated. A 30" barrel helps quite a bit too....

I'm doing a work up in a Ruger M77 Hawkeye predator 6.5 creed with uncoated 156's as well, trying both H4350 and RL26. I know RL 26 will be faster, but we will see how much. It's a 24" barrel, if I get over 2700 with h4350 I will be happy. Not sure what to expect from RL26 on this. To get them to fit in the mag (2.880" COAL to reliably feed) I'm jumping about .095", so we will see if they shoot well.

Also have a 7.5 twist 26" .264 WM with some loaded up using retumbo, hoping to break 3100 without pressure. But we will see what the magneto speed says in a few days.

I shot them in a 7.5 twist .264 WM yesterday. 3100 wasn't a problem at all with retumbo. But that's also a longer throated .264 so YMMV.
 
Did some work up in the .264 wm, very slight pressure sign at 69, ejector mark at 70 with increase bolt lift. Looks like 3100+ will be no issue!
20190718_104134.jpg
 
In a brand new 26" 1:7.5" 6.5SS, I hit 2998, 3011, 3024fps average of 3 shots with only a total of 21 rounds down the barrel. I am thinking I might hit 3100 once the barrel breaks in and speeds up.
 
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