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Swift Scirocco IIs in 280 AI

nhenry

Well-Known Member
Joined
Feb 6, 2021
Messages
239
Location
Kansas
I'm looking at developing a load using 150gr Scirocco IIs and H4831. Anyone using this combo? What speed are you seeing? How's accuracy?

My barrel is 24", 1:8.4tw, SAAMI spec throat.

Thanks in advance.
 
In my Rem 7 Mag, I shot 69-73g of R#25 with a Win mag primer, 3200+ fps, great accuracy. Seating depth will be a major factor for you and start close to the lands, two shot groups till you get dialed in less than 1/2".
 
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When I had my 280ai I loaded 58.5 gr of rl26 with 186 bergers. Shot one hell of a group and great velocity.
 
I'm looking at developing a load using 150gr Scirocco IIs and H4831. Anyone using this combo? What speed are you seeing? How's accuracy?

My barrel is 24", 1:8.4tw, SAAMI spec throat.

Thanks in advance.
I have 4 280 AI's and none of them like the 150 Scirocco's for some reason. Best groups are slightly over 1 MOA but it is not real consistent. Tried several seating depths and a couple of my favorite powders, but to no avail. I still have over 250 of these bullets so as I burn them up this summer, I'll try different combinations.
 
I have 4 280 AI's and none of them like the 150 Scirocco's for some reason. Best groups are slightly over 1 MOA but it is not real consistent. Tried several seating depths and a couple of my favorite powders, but to no avail. I still have over 250 of these bullets so as I burn them up this summer, I'll try different combinations.
Think I could convince you to send me like 20 to see if it's a waste of time?
 
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