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150 Sirrocco

 
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  #1  
Old 11-24-2012, 11:51 PM
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150 Sirrocco

I have been shooting factory Remington 150 grain Sirrocco's for a while and have been very happy with the performance in my 7MM. But, I would like to know if anyone has ever loaded these for long range shooting and if so, what are your thoughts?
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  #2  
Old 11-25-2012, 01:09 AM
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Re: 150 Sirrocco

I have not used them for long range, but what is long range to you? They may be fine.
I have used 168 gr. for longish range, and am currently using 180 gr VLD's for ranges from 800 to 1400 yards.
IME, a G1 BC of .488 has worked nicely for me as far as 750 yards. They start getting blown around a bit by then, but they have worked great, all in all.
What is the BC of your bullet?
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Old 11-25-2012, 01:27 AM
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Re: 150 Sirrocco

The B.C. is .515 and Secitonal Density .266. Reloading is a completely new to me and something that I really want to get to understand and feel comfortable with. I have several friends that reload and several of them really like the Accubond and have had great success and long ranges with them. I guess long range for me would be 600-700 yards. I am open to all suggestions, thanks for the reply.
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Old 11-25-2012, 01:29 AM
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Re: 150 Sirrocco

What is IME and G1? Not sure what exactly you are mentioning.
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Old 11-25-2012, 06:32 AM
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Re: 150 Sirrocco

I loaded them in my 7mag for years. They work great. It was one of the preferred long range bullets by John Burns prior to switching to the Bergers.

I found a website where Bryan Litz, at Berger, did testing on a lot of bullets and assigned a "corrected" BC. I don't remember if the Sciroccos were on that website. I suggest you email him to see if he did, and use that BC instead of what Swift puts out, unless they are the same, of course.

I used his corrected BC for the 150 nosler ballistic tip I'm using in my 280 and when I got to CO, my JBM chart couldn't have been more exact. I think Nosler said the BC was in the .48s and Litz said is was in the .45s

Be cautious though, JBM has a menu that is built in with given bullets and even though I had entered in the corrected BC, JBM changed it to published. I had to correct that and didn't notice it the first time.

The Scirocco is more finicky than the Nosler. It usually takes longer to work up a load. For 400-700 yards, I wouldn't hesitate to just use a Nosler ballistic tip.
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Old 11-25-2012, 06:34 AM
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Re: 150 Sirrocco

Quote:
Originally Posted by shedhunt View Post
What is IME and G1? Not sure what exactly you are mentioning.
IME is "in my experience." G1 is another BC number. There are 2, a G1 and G7 and they are different. Look here at Berger's website. They have both BCs listed with their products:

Hunting Bullets | Berger Bullets

Quote:
G1 vs. G7 Ballistic Coefficients Which Is Right for You?
G1 and G7 refer both refer to aerodynamic drag models based on particular "standard projectile" shapes. The G1 shape looks like a flat-based bullet. The G7 shape is quite different, and better approximates the geometry of a modern long-range bullet. So, when choosing your drag model, G1 is preferrable for flat-based bullets, while G7 is ordinarily a "better fit" for longer, boat-tailed bullets.
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Old 11-25-2012, 10:12 PM
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Re: 150 Sirrocco

Derek,

Thanks a bunch for the advise and information. I will definitely look to email the gentleman you suggested from Berger. I will look into it and let you know what I find out.
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