Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

GS 177 early test

 
LinkBack Thread Tools Display Modes
  #1  
Old 01-25-2012, 11:44 AM
Platinum Member
 
Join Date: Jan 2003
Location: The rifle range, or archery range or behind the computer in Alaska
Posts: 3,419
GS 177 early test

All,

The last couple of days at the range I tested a few GS 30 cal 177's. I only have an 11 twist barrel on my 308 and both GS and stability calculators recommend at least a 10 twist barrel. The stability calculators show that the 11x is about 1.0 +/- so I thought I would at least shoot one to see if it would punch the target straight or sideways. Two days ago it was 15 degrees and my range is less than 100 feet above sea level so the air was very dense and she punched nearly a straight hole. There was a detectable amount of yaw. So I decided yesterday to shoot a couple of groups. It was -5 degrees this time. While the groups were decent, there was quite a bit more yaw. These are on such the ragged edge of stability that 20 degrees of difference made a difference in how much they yawed. Even with this amount of yawing, the first group of 45.0 of VV N540 was 1 MOA and the second group using 45.5 of N540 printed 0.5 MOA. If they are just yawing a bit in 15 degree sea level air, hopefully they will perform well at higher altitudes and warmer air such as when and where I hunt dall's, lope and coues bucks.

I am taking a few of these to Arizona this week and will shoot them this weekend at 5000' in 60 degree air. If all goes well, these maybe my dall sheep load this year to see how they do on game. Assuming I can find a ram I want to shoot! According to the stability calculator, they should be 1.3 at 5000' and 60 degrees.

I seriously doubt the BC is anywhere near what GS says they are but that remains to be seen. Hopefully, this weekend I can squeeze in a double chrony test. Whatever the results, I wouldn't put too much stock into the test since they are not on the best side of the stability factor. My guess is that with more stability, they would be between .550 and .575. Just a guess. These have an amazing form factor but the sectional density in not nearly high enough for it to be .638 like GS claims. We'll see....

M
__________________
Quote:
Originally Posted by Broz View Post
Please just answer one very simple question. Why would anyone shooting long range load a low BC , low SD 168 gr offering in a 300 win???????

My answer to this is. The only reason is to make the 7 RM look good. There is no other reason.

Jeff.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: GS 177 early test
Thread Thread Starter Forum Replies Last Post
22N Early Bull Tag BSSX Long Range Hunting & Shooting 3 08-30-2011 11:56 AM
AZ Unit 10 Early Cow & Deer freese Elk Hunting 1 04-19-2011 10:29 PM
!!Big Early Season Sale!! lerch Guns For Sale 2 10-07-2008 02:22 PM
wtb early unertl scope accurange Optics For Sale 3 07-31-2008 07:52 AM
WTB Very Early Remington 700 cappi Guns For Sale 0 12-11-2007 04:53 PM

Current Poll
How Many Different Cartridges Do You Reload For?
ZERO, all factory ammo - 8.04%
329 Votes
1 - 2.83%
116 Votes
2 or 3 - 14.61%
598 Votes
4 or 5 - 20.45%
837 Votes
6 or 7 - 14.61%
598 Votes
8 or 9 - 8.87%
363 Votes
10 or more - 30.59%
1,252 Vote
Total Votes: 4,093
You may not vote on this poll.

All times are GMT -5. The time now is 07:26 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC