Question for you SG550 owners out there.

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Hello

I have been thinking of adding an SwissArms SG550 to my collection. The debate is between 1 in 7 and 1 in 10 rate of twist.

Now I know the reasons for both as far as to what ammo they where made for. But what I want to know is, in reality, does it make a big difference with all different types of ammo available to you when you shoot for groups. Is one hands down better for us north americans with the ammo we have?

Hope that makes sense;)


thanks

Sticker
 
1/10 is best if you want to use light varmint bullets and heavy up to 62 grains-ish. 1/7 is best if you want to use heavy bullets 55+ grains, and a must for the 70+ bullets. Since I plant to shoot 75 and 77 grains, I opted for the new 1/7 classic green.
 
The SG550 is a prohib, please call it what it is - a Classic Green, or Black Special - there are important technical differences between the SG550 and the others. The differences are what makes us able to own them, if the antis start playing their semantic games (even their owners call them 550's), we may lose the right to own these firearms.
 
I have had nothing but luck with 1 in 10" barrels. They shoot SS109 (C77) exceptionally well, and they are of course optimized for Swiss GP90 ammo. Some folks insist on using 77gr and heavier bullets, and they get better results with 1 in 7" barrels. The decision needs to be based on what load you plan on using.
 
ian_in_vic said:
The SG550 is a prohib, please call it what it is - a Classic Green, or Black Special - there are important technical differences between the SG550 and the others. The differences are what makes us able to own them, if the antis start playing their semantic games (even their owners call them 550's), we may lose the right to own these firearms.
Click to expand...

I agree. We shouldn't refer to it as a 550, since that is not what it is. It's kind of like referring to a CZ 858 as an AK-47.
 
redleg said:
I have had nothing but luck with 1 in 10" barrels. They shoot SS109 (C77) exceptionally well, and they are of course optimized for Swiss GP90 ammo. Some folks insist on using 77gr and heavier bullets, and they get better results with 1 in 7" barrels. The decision needs to be based on what load you plan on using.
Click to expand...


Thanks

This is the kind of info I'm looking for. First hand knowledge, and not what the books say.

Sticker
 
ian_in_vic said:
The SG550 is a prohib, please call it what it is - a Classic Green, or Black Special - there are important technical differences between the SG550 and the others. The differences are what makes us able to own them, if the antis start playing their semantic games (even their owners call them 550's), we may lose the right to own these firearms.
Click to expand...

what exactly is the difference?
I have heard that it is the lower trigger group layout, but thats only what I've heard and haven't seen any documentation or photo's on the matter.

How did we turn a prohib into a non-restricted?

some good details would be nice.
 
Speckfire said:
I've been shooting regular winchester 55gr fmj with my SIG with excellent results.
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X2!

Unless you're going for the uber heavy for caliber bullets, the standard SIG/Swiss Arms barrels seem to shoot everything pretty well, from the tiny 45gr pills, up to the heavy 77gr SMKs. Anything heavier and you're basically loading a single round at a time anyway, and who wants to do that all day? Maybe if you're David Tubb, but for most of us hobbyists, either barrel twist is fine. However, if you think you will be shooting those heavy/long pills, then snap up one of those 1:7" Classic Greens that just became available...it will save you hundreds of dollars in buying a new barrel and having someone install it for you if you aren't handy enough to do it yourself. I own a number of black rifles with barrel twists ranging from 1:7 to 1:12 and everything in between and I've found that they'll all shoot most bullets pretty well. For the most part, I think this nail-biting decision of which barrel twist is more than a little over-blown for most informal target shooters. High power, long distance shooters & long range varmint shooters, however, have somewhat different requirements. There I can see the need for a faster twist like the 1:7"..other than that, though, I wouldn't feel "under-gunned" with any standard twist shooting factory ammo.
 
I am considering the Classic Green too. One thing really hold me back is the Stamped and tig welded Sheet Metal Receiver which is usual for a military rilfe that need to be low manufacturing cost for mass production. Still feel that it is a little bit over priced compare to an AR15 which has a machined receiver at half the price. Just my opinion.
 
MUGEN said:
I am considering the Classic Green too. One thing really hold me back is the Stamped and tig welded Sheet Metal Receiver which is usual for a military rilfe that need to be low manufacturing cost for mass production. Still feel that it is a little bit over priced compare to an AR15 which has a machined receiver at half the price. Just my opinion.
Click to expand...

Lots of people think that all stamped and welded pieces are the same. I can assure you that they are not. The Swiss Arms built receivers are made of some of the toughest steel I have seen. They are incredibly hard. The rails are brazed on, and spot welded. You will never see an axis pin hole get worn or deformed. You will never see a receiver rail seperate. You will never see a receiver out of spec in any respect. FWIW the SAN receivers cost much more than 2x what an AR receiver costs, but usually in life, you get what you pay for.
 
redleg said:
Lots of people think that all stamped and welded pieces are the same. I can assure you that they are not. The Swiss Arms built receivers are made of some of the toughest steel I have seen. They are incredibly hard. The rails are brazed on, and spot welded. You will never see an axis pin hole get worn or deformed. You will never see a receiver rail seperate. You will never see a receiver out of spec in any respect. FWIW the SAN receivers cost much more than 2x what an AR receiver costs, but usually in life, you get what you pay for.
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REDLEG: Thankyou for your comment and your input. I actually do believe that Swiss made all kinds of high end stuffs from watch to industrial devices like Baumer sensors and too many to mention. I will keep the Classic Green on my wish list.
I can tell you I really like the PE90/ Classic green and eventually I will buy one.
 
UncleWalther said:
I agree. We shouldn't refer to it as a 550, since that is not what it is. It's kind of like referring to a CZ 858 as an AK-47.
Click to expand...

The cz-858 is a totally different firearm compared to an AK, The only simularities is they use a similar gas system and a similar mag (not even interchangable). The action and internal workings are totally different that's why you can buy a non-ristricted cz-858 and not an ak-47. I agree with you that people should know what to call there firearms, even in my manual that came with my Black Special it calls it a SG550. :sniper:
 
redleg said:
Lots of people think that all stamped and welded pieces are the same. I can assure you that they are not. The Swiss Arms built receivers are made of some of the toughest steel I have seen. They are incredibly hard. The rails are brazed on, and spot welded. You will never see an axis pin hole get worn or deformed. You will never see a receiver rail seperate. You will never see a receiver out of spec in any respect. FWIW the SAN receivers cost much more than 2x what an AR receiver costs, but usually in life, you get what you pay for.
Click to expand...

Quite the salesman, makes me want one even more;)

Sticker
 
Brentn said:
what exactly is the difference?
I have heard that it is the lower trigger group layout, but thats only what I've heard and haven't seen any documentation or photo's on the matter.

How did we turn a prohib into a non-restricted?

some good details would be nice.
Click to expand...

The Sig Classic Green, Black Special and the other variants, are based off the Sig 540, which is also non restricted IIRC.

Since the 550 is prohibeted by name, anything that was "based" off of it (including the PE90) are ALSO considered prohibeted.


From what i can remember, the upper on the Sig sporters are basically a Sig 550 upper & barrel assembally, but the lower is completely based off a Sig 540 lower, which is mechanically different than the 550 or PE90 lower is.
 
MUGEN said:
I am considering the Classic Green too. One thing really hold me back is the Stamped and tig welded Sheet Metal Receiver which is usual for a military rilfe that need to be low manufacturing cost for mass production. Still feel that it is a little bit over priced compare to an AR15 which has a machined receiver at half the price. Just my opinion.
Click to expand...

Hey,

If that sheet metal receiver can stand up to the high sal####er environment of coastal Newfoundland, it can stand up to anything! Of course, I'm pretty sure there aren't too many guys using $3000.00 rifles to go seal hunting with!:eek::D;)

They're great rifles, they simply "feel" solid and point like a dream. Not knocking the AR platform. I love 'em and love building them, but there is no mistaking the grin and feeling that a guy gets after shooting his first mag out of a true Swiss Arms/SIG rifle!:) I'd love for them to be less expensive, but I am prepared to pay for the quality I get and the Swiss rifles have that in spades!
 
X-man said:
If that sheet metal receiver can stand up to the high sal####er environment of coastal Newfoundland, it can stand up to anything!
Click to expand...

The SG550 doesn't do well in warm humid environments IMO. There's some website somewhere where they show all the testing the Swiss Army did, freezing them, etc.

This is great if you live in Switzerland.

However I had one in Florida when I lived there, and stopping rust inside of the receiver was a major PITA. That graphite grease they use doesn't work well in humid environments either. So I had to remove it all and pay very close attention, especially where the rails are welded to the inside of the receiver. (And believe me, encountering rust on an SG550 in the US is a heart-stopping experience because they're worth a mint there).

Probably not a problem if you live in Canada though. Maybe BC during the summer.

Definitely not as rust-resistant as an M16 because of the aluminum receiver.
 
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