62 eld vt

[RussellJ]

ahhh okay gotcha

62 ELD-VT Bullets at 3200ish FPS

 

[Benchrest Braxton]

Oh, they are stable. Probably trying to spin apart.

It appears that more spin is bad.

4g or 5r rifling?

 

[G6br]

Just started playing around with th 62g ELDVT, initial 5 shot group looks promising.
22br 1:7:5, 28 in barrel. Velocity 3,340.

 

[jelenko]

Just started playing around with th 62g ELDVT, initial 5 shot group looks promising.
22br 1:7:5, 28 in barrel. Velocity 3,340.

FYI. You're spinning them at 320K

 

[Nomosendero2]

FYI. You're spinning them at 320K

Should do serious damage!

 

[urbanrifleman]

Should do serious damage!

Or pop them like popcorn when the barrel gets dirty.

 

[Nomosendero2]

Or pop them like popcorn when the barrel gets dirty.

Any data on that?

 

[urbanrifleman]

Any data on that?

What data do you need? You start spinning bullets at crazy rpms, bad things happen. There have been lots of posts about not over over spinning the 62 in particular.

When I tested the 7 twist with this bullet it shot horribly. The 8 twist is accurate to about 3450 then it goes away. I don't know anyone having success with this bullet over spinning it.

Lots of the 55s and 53s are fine being over spun. Shoot great. Not these guys.

 

[jelenko]

Any data on that?

Call Hornady and ask them.
For their 75 gr HPBT's, they strongly recommend 280K or less.
Sierra recommends 250 - 260K

 

[Nomosendero2]

Call Hornady and ask them.
For their 75 gr HPBT's, they strongly recommend 280K or less.
Sierra recommends 250 - 260K

Well there you go, thanks
Looks like I don't need to make that call!

 

[Lefty2506]

No

I'm guessing that this response is based on experience, but I'm wondering why its true from a physics perspective. Math says that at 3500 fps, a 9 twist should be spinning at 280k. I thought that was in the sweet spot, but I'm probably confusing my VERY limited knowledge on the 62gr with something else. If it needs to spin faster, can you just push it harder? At 3750, it should be spinning 300,000 rpm.

I have noticed that a lot of lighter bullets don't seem to care if you over spin them. Many years ago I worked up a load for a 40gr NBT that ran 3800 fps in an 8 twist Wilson (342k rpm). They weren't bug holes, but they were in the 1/4 moa range and at that time I didn't know an AR could do that. For years, that caused me to discredit people who would claim they were having accuracy issue due to over spinning the bullet. Now it makes a little more sense.

 

[urbanrifleman]

I'm guessing that this response is based on experience, but I'm wondering why its true from a physics perspective. Math says that at 3500 fps, a 9 twist should be spinning at 280k. I thought that was in the sweet spot, but I'm probably confusing my VERY limited knowledge on the 62gr with something else. If it needs to spin faster, can you just push it harder? At 3750, it should be spinning 300,000 rpm.

I have noticed that a lot of lighter bullets don't seem to care if you over spin them. Many years ago I worked up a load for a 40gr NBT that ran 3800 fps in an 8 twist Wilson (342k rpm). They weren't bug holes, but they were in the 1/4 moa range and at that time I didn't know an AR could do that. For years, that caused me to discredit people who would claim they were having accuracy issue due to over spinning the bullet. Now it makes a little more sense.

I agree that you would think a 9 twist would work at those speeds.

But from reports, it doesn't.

 

[Lefty2506]

Might be worth trying to collectively build list of what has worked (velocity and twist) vs what has not. No need to repeat the mistakes that have already been tried multiple times.

 

[dantiff2]

I have noticed that a lot of lighter bullets don't seem to care if you over spin them. Many years ago I worked up a load for a 40gr NBT that ran 3800 fps in an 8 twist Wilson (342k rpm). They weren't bug holes, but they were in the 1/4 moa range and at that time I didn't know an AR could do that. For years, that caused me to discredit people who would claim they were having accuracy issue due to over spinning the bullet. Now it makes a little more sense.

I've seen same with 50-55 grain bullets. My current load has 52 grain bullets at 350.000 rpms and they shoot GREAT out of a few barrels. However, I refuse to put my suppressor on these rigs because I know what will happen. Murphy's law... On the contrary. My testing showed 69 smk's shot best from a 9 twist vs a 7 twist. I would think an 8 twist is the sweet spot for the 62's but have no experience with them to confirm.

 

[urbanrifleman]

Might be worth trying to collectively build list of what has worked (velocity and twist) vs what has not. No need to repeat the mistakes that have already been tried multiple times.

8 twist. 3450 or slower.

That's about it.

 

[Lefty2506]

8 twist. 3450 or slower.

That's about it.

But, but, but I wanna shoot faster....

It will be interesting to see what that 69gr looks like. Hopefully, the swaged a hollow cavity into the lead to shift the weight farther forward and that helps with this issue.

 

[jelenko]

Something odd here.
JBM's stability calculator says the 62 eldvt is unstable in a 9 twist barrel at the same RPM's that it's stable in a 8 twist.
Stability has nothing to do with how the bullet got spinning.
I'm asking Hornady.

ETA. Hornady tech says if it's spinning at least 260K it's stable.

 

[nr123]

My experience has been the same as urbanrifleman. My loads are running close to 3400 fps in my Tikka 22-250, 8 twist. I tried hotter, but lost my accuracy. The 62 vt is my go to bullet for night time coyote hunting.

 

[searcher]

I shot them all day yesterday. 22bra 8 twist at 3470. Really great performance. Good splody. Very accurate. Good wind performance.

Center hits were pretty gruesome.

I'd say this bullet is a winner. My barrel shoots the crap out of them.

I agree with the splat factor! Out of my .22 Nosler, body parts fly everywhere. Very few wounded.

 

[Lefty2506]

Just noticed that VV has updated their load data to include the 62gr ELD-VT from a .223. Their load data indicates that a max charge of N540 will push it at 3200 fps, and a max charge of N135 and N140will both exceed 3100 fps. Makes me wonder how much more case volume would really be needed to gain an extra 150-200 fps. I don't think an AI would quite get it there, but it seems like a 22 Nosler or 22 Valkyrie would be able to do it. I'm assuming their load data for those cartridges are safe for gas guns. Moving to a bolt gun could also bump things up a little more.