215 gr bullets and h1000
- Thread starter morebullets
- Start date
Purple shoulder
Regular
- Location
- Winnipeg MB
Ive done 220 grain seirra HPBT in a 10 twist with no issues. But those 215 bergers? are longer i think. This is where a 10 twist meets it limitaion.
ruger-ruger
CGN Regular
Yes I shoot a 215 berger out of a custom 300 win mag. Stiller action, Brux #3 barrel one in ten twist and a Holland brake .
It was chambered with a tac reamer ( extra freebore so bullets can be seated long).
Have shot it at 100, 200, 500. 700. and 900. All shoot very well.
How fast are you driving them? Mine are just over 3000fps.
It was chambered with a tac reamer ( extra freebore so bullets can be seated long).
Have shot it at 100, 200, 500. 700. and 900. All shoot very well.
How fast are you driving them? Mine are just over 3000fps.
If they are stable at long distance, they are stable at short distance. Berger says you need a 1 in 9" to stabilize their 215 grain, but 210 is OK with a 1 in 10. This probably means the 215 should be good at shorter distances but may get in trouble at long distance. See this link.
If you use this Berger calculator to get a closer estimate with your altitude, temperature, and barrel twist. You should be able to select the 215 bullet out of the look up list. From what I can see you should be OK.
captainmike
CGN Regular
- Location
- GVA- fraser valley BC
I shoot them in my 308 and 1-10 twist with no problem and i am slower than you guys with 2670fps
Purple shoulder
Regular
- Location
- Winnipeg MB
Bullets become more stable the longer they travel. If they are stable at short distance they will not de-stabilize at long distance. Sorry, just sayin.
Purple shoulder
Regular
- Location
- Winnipeg MB
What are you saying then? I always hear alarm bells ring when I hear somebody say their bullets get more accurate as they go down range... Yes, a slow twist flat base target bullet will print small targets at 100, but will not be so good at 500. And a high BC boat tail will be better at 500 than the 100 yard flat base, but will probably be beaten by the flat base at 100. However, here we are talking about one bullet getting better at 500 than at 200...
Purple shoulder
Regular
- Location
- Winnipeg MB
Never mind. You're right.
Last edited:
I stand by my statement. The OP said "At 200 yards i found they grouped like crap but out at 500 yards they grouped very well. Is a 10 twist fast enough to stabilize them at shorter distances."
#1 it is not possible to group very well at 500 when they group like crap at 200. And they are stable at 200 if they are stable at 500.
Purple shoulder
Regular
- Location
- Winnipeg MB
I'm beginning to realize we are getting into semantics here. I never said a bullet becomes more accurate as it goes down range.
I also stand by my statement that a bullet that is stable at short range will not "get into trouble" at longer ranges. Not stability wise anyway.
I partly agree. The theory is that straight ahead velocity deteriorates faster than angular spin velocity, so the bullet in fact becomes more stable as it goes down range (providing it was stable coming out of the barrel). But bullets get into trouble when they approach sonic velocity. Some seem to survive it better than others. Some lose stability. I don't shoot centerfire at those kind of long distances, so have no experience. I do shoot rimfire, and I believe this is the reason target ammo is subsonic - to avoid the transonic issues.
Some discussion of the issue in this article by Brian Litz.
I would say you should look in the mirror, you are a clone of sunray.
I told sunray to read more and post less.
You also remind me of a poster at Cast Boolits by the name of multigunner, the problem is multigunner doesn't cast bullets or even have a reloading press.
The word "poser" comes to mind, and several members here read you the same way.
- Location
- Jameson, SK
I've not experienced it, but others have reported this phenomenon. I agree with you, it makes no sense.
Somewhere on this interweb is a write up about a spinning bullet balance tester that, based on amperage draw or voltage drop, quantified the symmetry of bullets. Bullets that were tested as "balanced" absolutely shot out the lights at long distances. It's not the Jeunke (sp?) machine that I'm speaking of. I've tried to engage a couple people to revisit this idea, but no takers so far.
Not sure what you did to earn the Sunray analogy, but I don't mind ya. Sunray gave advice that would kill the shooter.
GGG
