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Picture of stormwalker
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SCAR 17 20" barrels still in stock at MGW.
http://www.midwestgunworks.com...ar-accessories/98818

Received mine today and look forward to the addition 150-200 fps it should produce. Big Grin

 
Posts: 457 | Location: Florida | Registered: December 24, 2011Reply With QuoteReport This Post
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Yikes, that's $5.70/fps! Looks good though.




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Posts: 2341 | Location: Oregon | Registered: October 02, 2005Reply With QuoteReport This Post
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MK20 SSR Clone time?


Drool - except for the price tag of all things SCAR Frown


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Long Live the Super Thirty-Eight
 
Posts: 10136 | Location: Mid-Michigan | Registered: October 02, 2007Reply With QuoteReport This Post
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quote:
Originally posted by jjkroll32:
MK20 SSR Clone time?


Drool - except for the price tag of all things SCAR Frown


More or less, the MK20 SSR has a heavier profile barrel with an addition 2 bolts securing it to the receiver.
I'm only averaging 2400 fps using a 168gr. loading from the 16.25" barrel and hope the extra 4" will to get me to 2600 fps.
 
Posts: 457 | Location: Florida | Registered: December 24, 2011Reply With QuoteReport This Post
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quote:
Originally posted by Strambo:
Yikes, that's $5.70/fps! Looks good though.


Thanks! It's only money, and I can't take it with me.
 
Posts: 457 | Location: Florida | Registered: December 24, 2011Reply With QuoteReport This Post
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posted Hide Post
quote:
Originally posted by stormwalker:
quote:
Originally posted by jjkroll32:
MK20 SSR Clone time?


Drool - except for the price tag of all things SCAR Frown


More or less, the MK20 SSR has a heavier profile barrel with an addition 2 bolts securing it to the receiver.
I'm only averaging 2400 fps using a 168gr. loading from the 16.25" barrel and hope the extra 4" will to get me to 2600 fps.


I'm curious what benefit you get with an extra 200 fps?
 
Posts: 740 | Location: USA | Registered: December 11, 2005Reply With QuoteReport This Post
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quote:
Originally posted by calugo:
quote:
Originally posted by stormwalker:
quote:
Originally posted by jjkroll32:
MK20 SSR Clone time?


Drool - except for the price tag of all things SCAR Frown


More or less, the MK20 SSR has a heavier profile barrel with an addition 2 bolts securing it to the receiver.
I'm only averaging 2400 fps using a 168gr. loading from the 16.25" barrel and hope the extra 4" will to get me to 2600 fps.


I'm curious what benefit you get with an extra 200 fps?


A flatter trajectory and increased muzzle/kinetic energy, just about 10 inches of drop and 200 foot pounds of energy @ 500 yards.
 
Posts: 457 | Location: Florida | Registered: December 24, 2011Reply With QuoteReport This Post
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Picture of entropy
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quote:
Originally posted by stormwalker:
quote:
Originally posted by Strambo:
Yikes, that's $5.70/fps! Looks good though.


Thanks! It's only money, and I can't take it with me.



Indeed.

Enjoy and post a pic. Dont know much about the SCAR, but am "SCAR curious".
 
Posts: 10000 | Location: At the end of the gravel road. | Registered: November 02, 2006Reply With QuoteReport This Post
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quote:
Originally posted by stormwalker:
I'm only averaging 2400 fps using a 168gr. loading from the 16.25" barrel and hope the extra 4" will to get me to 2600 fps.

From what I've seen, 2400 fps with 168 in a 16" is a touch on the slow side. IIRC roughly 2450 was what other students were seeing with FGMM 168. You might try a box of FGMM 168 or Hornady TAP 168 as a velocity base line.

Getting 200 fps out of 4 additional inches will be a tall order, which would be 50 fps per inch. There are a few ballistics by the inch type tests on the webz -- 20 to 30 fps per inch is more likely from a given 308 load.
 
Posts: 4603 | Location: Colorado | Registered: January 26, 2008Reply With QuoteReport This Post
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quote:
Originally posted by fritz:
quote:
Originally posted by stormwalker:
I'm only averaging 2400 fps using a 168gr. loading from the 16.25" barrel and hope the extra 4" will to get me to 2600 fps.

From what I've seen, 2400 fps with 168 in a 16" is a touch on the slow side. IIRC roughly 2450 was what other students were seeing with FGMM 168. You might try a box of FGMM 168 or Hornady TAP 168 as a velocity base line.

Getting 200 fps out of 4 additional inches will be a tall order, which would be 50 fps per inch. There are a few ballistics by the inch type tests on the webz -- 20 to 30 fps per inch is more likely from a given 308 load.


Agreed; there is not much ballistic data by the inch from the same platform, and 20-30 fps sounds reasonable from a given commercial loading. Speaking of Hornady, what do you think of their super performance line?
 
Posts: 457 | Location: Florida | Registered: December 24, 2011Reply With QuoteReport This Post
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Picture of stormwalker
posted Hide Post
quote:
Originally posted by entropy:
quote:
Originally posted by stormwalker:
quote:
Originally posted by Strambo:
Yikes, that's $5.70/fps! Looks good though.


Thanks! It's only money, and I can't take it with me.



Indeed.

Enjoy and post a pic. Dont know much about the SCAR, but am "SCAR curious".


Thanks! I will post a pic when the extended fore-rail arrives. The SCAR is a great modular carbine that allows quick barrel changes with minimal change to point of impact.
 
Posts: 457 | Location: Florida | Registered: December 24, 2011Reply With QuoteReport This Post
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quote:
Originally posted by stormwalker:
Speaking of Hornady, what do you think of their super performance line?

Superformance 308 increases MV about 110 fps for both their 168 and 178 grain bullets in my 23" Bartlein barrel. SDs are in the high single digits for both loads.

Below 50 degrees F with a cold gun the Superformance ammo performs nicely -- quite accurate at distance, no pressure signs.

Around 60-70 degrees F I see pressure signs -- sticky bolt, flattened primers, and difficult case extraction.

By 80-90 degrees F the pressure signs become intolerable -- almost all primers are blown, cases are very difficult to extract, opening my Defiance-action bolt takes a sharp blow with a gloved hand or a rubber mallet.

On Snipers Hide forum I've seen a Hornady-sponsored competitor state that Superformance ammo may a bit hot for semi-auto platforms.

I have maybe 5-10 rounds of Superformance 178 sitting in my basement. I will eventually shoot those rounds sometime during the winter months, but it's already too warm around here to risk shooting them in my rifle. I will never buy another box of Superformance again.
 
Posts: 4603 | Location: Colorado | Registered: January 26, 2008Reply With QuoteReport This Post
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Picture of stormwalker
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quote:
Originally posted by fritz:
quote:
Originally posted by stormwalker:
Speaking of Hornady, what do you think of their super performance line?

Superformance 308 increases MV about 110 fps for both their 168 and 178 grain bullets in my 23" Bartlein barrel. SDs are in the high single digits for both loads.

Below 50 degrees F with a cold gun the Superformance ammo performs nicely -- quite accurate at distance, no pressure signs.

Around 60-70 degrees F I see pressure signs -- sticky bolt, flattened primers, and difficult case extraction.

By 80-90 degrees F the pressure signs become intolerable -- almost all primers are blown, cases are very difficult to extract, opening my Defiance-action bolt takes a sharp blow with a gloved hand or a rubber mallet.

On Snipers Hide forum I've seen a Hornady-sponsored competitor state that Superformance ammo may a bit hot for semi-auto platforms.

I have maybe 5-10 rounds of Superformance 178 sitting in my basement. I will eventually shoot those rounds sometime during the winter months, but it's already too warm around here to risk shooting them in my rifle. I will never buy another box of Superformance again.


Great info, thanks for posting! I think that I will pass on the superformance as well.
 
Posts: 457 | Location: Florida | Registered: December 24, 2011Reply With QuoteReport This Post
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