Has anyone ever used GSC bullets?
- Thread starter Grimstod
- Start date
You will notice that their BC is very high. Most require gain twist barrels with exit twist of 4.5-6.5. That is starting out around 11 or 12 and end in either a 4.5 up to 6.5. A few of us extreme long range shooters have discovered that bullets that claim BC over 1.0 is BS. Lutz`s Viking was example. As soon as it came out of barrel, went sideways. It takes weight to make BC and brass bullets isn`t the way to go. The Hornady 750gr Amax is actually over 1.0 but the 50 BMG can`t push it fast enough to see any advantage. Cutting Edge makes a .375 425gr and after testing in a Bartlein Gain twist (12-6.5exit) BC was around .950 and it will stabilize. I won`t mention names but some very knowledgeable shooters have tried the GSC high BC bullets with bad results. Also driving bands reduce BC because each band causes drag. Another problem is the tail. Most shooters shy away because of the high price of machined solids but when trying to hit man sized targets between 2500yds and 2 miles (3520yds), no jacketed bullet can compare.
The claimed BC was never verified in a bullet test.
The older, now discontinued, 295 SP (I think that was the weight) was not stable regardless of the twist barrel that it was fired from (several were tried, including one 338 LM Ackley Improved, with a 5.4" exist twist).
The lighter version - 232 SP BC was verified, but was significantly less than that posted on the site.
Jeffvn
The older, now discontinued, 295 SP (I think that was the weight) was not stable regardless of the twist barrel that it was fired from (several were tried, including one 338 LM Ackley Improved, with a 5.4" exist twist).
The lighter version - 232 SP BC was verified, but was significantly less than that posted on the site.
Jeffvn
Grimstod
Machinist, Designer, and Shooter.
What if you were to get the center of gravity moved farther forward like with a arow from a bow?
I also noted the drive bands but he manufactures clame that because they are profiled outside of the bulkets body they should cause less drag. I am a little skeptic of this though.
I also noted the drive bands but he manufactures clame that because they are profiled outside of the bulkets body they should cause less drag. I am a little skeptic of this though.
Sling,
Jeffvn,
If anyone wishes to verify facts around GSC bullets, e-mail me via our websites and I can supply links and advice. GSC has been making bullets for 32 years and we have learned a little in that time. ;D
GSC makes bullets and also make available a technical profile for each bullet. This is so that shooters can determine, before spending hard earned cash, whether a bullet will be suitable for a given application or not. Go to Technical Data on the GSC website and follow the appropriate links.
To prevent this sideways thing, we supply the above mentioned technical profile for each bullet. It is usually a mismatch of Sg or a launch speed that is too high for the design that causes this.
That is why GSC does not use brass. Apart from the weight, brass has other qualities that GSC does not believe is good for a barrel internally and in terminal ballistics.
This is confusing. Above I see: "A few of us extreme long range shooters have discovered that bullets that claim BC over 1.0 is BS."
GSC is aware of these claims and has concluded that some of these 'knowledgeable shooters' are not that knowledgeable. It seems that there is an agenda and that GSC does not suit them, for other reasons. See: http://www.gsgroup.co.za/shgallierrors.html for an example.
This is true where the groove forms a continuous ring after engraving by the barrel. Examples are grooved bullets or a deep cannelure. It is not true for drive bands, such as those on GSC bullets. GSC drive bands are interrupted and not anywhere near as deep as a cannelure or groove and are buried in the boundary layer on the bullet in flight.
I have not heard this before. Kindly elaborate more about this.
Jeffvn,
We make no claim for BC. See the individual technical profiles for any GSC bullet. There is much confusion about BC numbers and in our new format technical profile we clarify BC as we see it. Have a look at the section opposite the BC numbers on this page as an example: http://www.gscustomusa.com/264095HV134.html
With respect, those who maintain that position applied the bullet incorrectly. Mostly, the launch speed was exceeded or the twist rate was incorrect. This particular bullet won the Lapua Sniper Competition (later the Finn Sniper Competition) four times in a row but it was correctly applied.
This is what the people who did the 'testing' wanted you to believe. Fact is that all manufacturers got their BC numbers wrong and that GSC was in the top three that were closest.
If anyone wishes to verify facts around GSC bullets, e-mail me via our websites and I can supply links and advice. GSC has been making bullets for 32 years and we have learned a little in that time. ;D
Upgrades & Donations
This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.