88 edlm
- Thread starter kochie
- Start date
xswanted
Gold $$ Contributor
They should. But your elevation and barrel will make a difference. Twist can vary slightly from one 8 twist to another.
I’ve shot 88s from a 8 twist 22-250 AI and a 22 Br and they both stabilized. The BC was significantly lower than advertised though and anything gained by the higher BC compared to the 80 ELD was lost due to a slower velocity.
Having said all of that the Berger 85.5 will work in the same to rifles with the BC coming out to be very close to correct.
We've shot the 80 Noslers too, but if you can make the 88s work, they are the king of 22 cal long range bullets. 85 RDFs are a close second out of the loads I've tried.
RegionRat
Gold $$ Contributor
Just a comment in general, in case you haven't had loads of experience with the world of risk and external ballistics...
The bullet and twist stability models we use in the hobby are not like laws of physics, they are approximations based on observations that are known as parametric studies.
That means we attempt to describe the bullet's stability behavior based on parameters and the lab observations. This is a different type of calculation than when calculating the exact forces on a body and predicting the exact behavior.
In other words, there are risks of over or under estimating what will really happen when using a parametric model when all is said and done. When they work when the model says they shouldn't, or when they don't work when the model says they should, is not rare. Usually we find the reasons are that the bullet in question is not constructed like the ones used when making the math models.
If the CG is too far backward or forward, as in the example of some tipped hollow points, or when there are density differences front or back that are very unique, there can be results that the model doesn't predict.
Now that we said that much, I will add that lab studies have shown that when these stability equations are applied to commercial bullets in our hobby, they are a fair estimate when you stay in the "recommended zones". That would mean you can be pretty sure you are rarely going to see keyholes when your SG is say 1.4 and above.
Sometimes, the discussion leans towards SG at or near 1 or below 1.3 and then the debates begin.
There can be many times when situations would pencil out as SG = 1.0 and it doesn't go unstable, and as many where the SG is 1.3 and it tumbles.
Just remember the Miller Equation and other studies are parametric models, not exact dynamics. There is margin when you get greater than 1.4 and no guarantees regardless when you are below that.
I just got off a trip where a Hornady 20 caliber 40 VMax is barely above SG 1 and yet it shoots great. The density altitude where I was shooting in Wyoming in hot and humid weather was generally 6800 to 7200 feet although the real altitude was about 4300 feet. That plays a role in reducing the forces that destabilize the bullet.
Just know that there are risks when you play below SG 1.4 and your results may not match someone else's when you play there. As long as you can afford to take those risks, no reason not to try.
The bullet and twist stability models we use in the hobby are not like laws of physics, they are approximations based on observations that are known as parametric studies.
That means we attempt to describe the bullet's stability behavior based on parameters and the lab observations. This is a different type of calculation than when calculating the exact forces on a body and predicting the exact behavior.
In other words, there are risks of over or under estimating what will really happen when using a parametric model when all is said and done. When they work when the model says they shouldn't, or when they don't work when the model says they should, is not rare. Usually we find the reasons are that the bullet in question is not constructed like the ones used when making the math models.
If the CG is too far backward or forward, as in the example of some tipped hollow points, or when there are density differences front or back that are very unique, there can be results that the model doesn't predict.
Now that we said that much, I will add that lab studies have shown that when these stability equations are applied to commercial bullets in our hobby, they are a fair estimate when you stay in the "recommended zones". That would mean you can be pretty sure you are rarely going to see keyholes when your SG is say 1.4 and above.
Sometimes, the discussion leans towards SG at or near 1 or below 1.3 and then the debates begin.
There can be many times when situations would pencil out as SG = 1.0 and it doesn't go unstable, and as many where the SG is 1.3 and it tumbles.
Just remember the Miller Equation and other studies are parametric models, not exact dynamics. There is margin when you get greater than 1.4 and no guarantees regardless when you are below that.
I just got off a trip where a Hornady 20 caliber 40 VMax is barely above SG 1 and yet it shoots great. The density altitude where I was shooting in Wyoming in hot and humid weather was generally 6800 to 7200 feet although the real altitude was about 4300 feet. That plays a role in reducing the forces that destabilize the bullet.
Just know that there are risks when you play below SG 1.4 and your results may not match someone else's when you play there. As long as you can afford to take those risks, no reason not to try.
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