6mm Twist Rate Question

[918v]

Would any 6mm fans please help me, please, pretty please?

I have a 1-14" 6mm PPC. Will a 70gr Sierra Blitzking stabilize in that barrel at 3000 FPS? The bullet is .9" long and it fails in on-line ballistic calculators, but we all know real life is different.

Thanks,

918v

 

[Victor N TN]

Re: 6mm Twist Rate Question

The boat tail will throw you off a bit on short range. But they'll shoot OK. You may be able to shoot 1/2" with them. If you want to get the most from that cartridge, get some handmade customs.

 

[918v]

Re: 6mm Twist Rate Question

That's certainly good news. Thank You!

 

[wnroscoe]

Re: 6mm Twist Rate Question

1-14 twist PPC's typically shoot 68 grain flat base bullets with N-133 or T-Byrd. 70's will work fine but may not be the absolute king.

 

[918v]

Re: 6mm Twist Rate Question

Thanks. I'm just looking for a hunting bullet that's readily available. I tried their 55gr bullet, but seating them is a pain, hence the boat-tail. I'd like to try the 65gr. Vmax as well.

 

[Victor N TN]

Re: 6mm Twist Rate Question

Personally I have happened upon a stash of old IMR 8208. But I have used N-133, H-322, IMR-4198 and Re-10 for bullets in the 65 to 69 grain weight class. Of the mentioned powders N-133 is the cleanest. H-322 is easier to tune. IMR-4198 is easier to find.

Good luck.

 

[Clark]

Re: 6mm Twist Rate Question

A 75 gr Vmax is .935" long, and launched at 3000 fps with a 1 in 14" twist, it can make a 0.1" group at 50 yards, and key hole at 100 yards.


This is a real problem for me.
My place looks like a junk yard for 6mmPPC 20" 1 in 14" twist take off bull barrels from Hart, Shilen, Krieger, and Lilja.
What can be done with them?
No one makes a good .8" long 6mm deer bullet

 

[selfbowhunter]

Re: 6mm Twist Rate Question

the 65 v-max was outstanding in my ppc with h322. i could make 3450fps or better with .250 average accuracy. my boys have shot deer with this bullet in their 243's. they are not ideal but they did work.

chuck

 

[918v]

Re: 6mm Twist Rate Question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Clark</div><div class="ubbcode-body">A 75 gr Vmax is .935" long, and launched at 3000 fps with a 1 in 14" twist, it can make a 0.1" group at 50 yards, and key hole at 100 yards.
</div></div>

Have you tried shorter bullets? Do they keyhole?

 

[Victor N TN]

Re: 6mm Twist Rate Question

I'm not exactly sure what 6mm HUNTING type bullets are available for a 14" twist. But here is a link to something that might help.

http://www.barnesbullets.com/products/rifle/tsx-bullet/

The copper Barnes bullets are something I have very little experience with. I have some to try and other even ordered. But they are in different calibers. And it'll be probably the spring before I can get serious about any testing.

As a thought, if it were me I might call some bullet companies and see what they offer for a 6mm 1:14 barrel.

Here's a link to Nosler that has some data for 6PPC: http://www.nosler.com/index.php?p=15&b=6mm&s=169

Good luck.

 

[918v]

Re: 6mm Twist Rate Question

By hunting I mean varmints. In my earlier experiments, I found this rifle preferred Hornady and Sierra to Nosler in the 55gr weight range, but I kinda want the heavier bullet. But it may like the 70gr. Nosler. 70 is alot different than 55.

 

[Victor N TN]

Re: 6mm Twist Rate Question

The 65 and 68 grain benchrest bullets we used to make have been used a lot for groundhogs and prairy dogs. I believe ALMOST any hollow point bullet will do what you want for smaller critters. I misunderstood the "hunting" part.

 

[Clark]

Re: 6mm Twist Rate Question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 918v</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Clark</div><div class="ubbcode-body">A 75 gr Vmax is .935" long, and launched at 3000 fps with a 1 in 14" twist, it can make a 0.1" group at 50 yards, and key hole at 100 yards.
</div></div>

Have you tried shorter bullets? Do they keyhole? </div></div>

The 65 gr Vmax can do 0.3" at 100 yards here at the Issaquah range near Seattle.

I set up a target in November at 500 yards on public land in Montana and shot 270 and 7mmRemMag.
That was my first access to non living long range targets.
I must do more of that.

 

[selfbowhunter]

Re: 6mm Twist Rate Question

if it is varmints you are after, try the 65 v-max. i think it will do everything you want it to very well. i have shot a lot of prarie dogs and jack rabbits with this bullet in the ppc and BR.

chuck