6mm bullet for 1:10 twist

[JustSomeGuy264]

Have a question for you all, I'll try to provide s much info as I can.

I have a relative who used to hunt with his uncles 6mm Remington probably 25 years ago. The gun changed hands a few times and I ended up with it by chance a few years ago and gave it to my relative.

He says the gun used to punch bullet holes but now he says it shoots volleyball sized groups.

All I know is its a Parker Hale in 6mm rem. with a 1:10 twist. He tried 2 factory loads: 95 grain Hornaday and 100 grain core lost and neither shot well.

Thats a long way around to my question which is, would anyone happen to know what grain bullet would work best in this gun?

Thanks

 

[Bill M.]

Posting from a weak memory. I think the original chambering had the 1/10 twist and later they went to the 1/9 so it would stabilize the heavier bullets? I would try lighter bullets. I like the 70 grain Speer TNT in my 6mm and midrange powder charges of 4350. I like them because they are flat based and I get a better grip when they are loaded long. I think both bullets you listed are too heavy for the gun he is shooting. I would also check the crown for damage and the scope mounts and scope for problems. I have not shot any factory loads in my 6mm so I do not know what to expect to find when looking. Load him up some. The 70 grain bullets are still a long looking bullet. You might drop down to 50 or 60 grain bullets as a test of principle. In the groups he is getting now do they wobble or keyhole?

 

[Scrupplez]

If he is using the same ammo that used to punch bullet holes and are now grouping like a scatter gun, I would lean more toward bore scoping the barrel and looking for carbon and copper build up.

As mentioned above the crown would also be wise to check as well.

 

[Scott.M]

Posting from a weak memory. I think the original chambering had the 1/10 twist and later they went to the 1/9 so it would stabilize the heavier bullets? I would try lighter bullets. I like the 70 grain Speer TNT in my 6mm and midrange powder charges of 4350. I like them because they are flat based and I get a better grip when they are loaded long. I think both bullets you listed are too heavy for the gun he is shooting. I would also check the crown for damage and the scope mounts and scope for problems. I have not shot any factory loads in my 6mm so I do not know what to expect to find when looking. Load him up some. The 70 grain bullets are still a long looking bullet. You might drop down to 50 or 60 grain bullets as a test of principle. In the groups he is getting now do they wobble or keyhole?

244 came out with a 1-12" twist. It was then renamed to 6mm Rem with a 1-9" twist, which is standard for that cartridge, but who knows what the Europeans did.

 

[Bill M.]

Thanks for correcting that. Mine is a 6mm with the 1/9 twist I think. It shoots 95 grain bullets just fine. I am thinking maybe the problem is with the rifle and mounts for that big a group.

 

[Walkalong]

Give it a serious cleaning

 

[Scott.M]

Both of the bullets mentioned should work. Assuming scope/mounts etc are tight/proven. Action screws torqued up, nothing bidding etc.

I also don't know what one person's 'didn't shoot well' definition is or what they are capable of shooting. I'm assuming you/he/they reload since you're asking about bullets, correct?

 

[243winxb]

HSM 6mm Remington 75 Gr. Hornady V-Max- http://www.selwayarmory.com/hsm-6mm-remington-75-gr-hornady-v-max-box-of-20.html

Bullet length. Sierra 85 gr hpbt -.934" #1530.
Hornady SST 95 gr - 1.102"
Hornady 75 gr V max- .942"

Shorter bullets better match a 10 twist rate.

 

[AJC1]

1. check the easy stuff like stock mounting bolt torques, and scope mounts.
2. give the barrel a deep clean with something like eliminator that removes copper and other types of fowling. inspect crown
3. have the bore scoped to look for fowling like carbon ring throat erosion and cracking
4. try top shelf ammunition to see if its a load or poor ammunition problem.

 

[JustSomeGuy264]

They used to reload back in the day but haven’t for many years now so there’s some controversy over whether it ever shot factory loads that well. When they did reload no one remembers what train bullets they used.

He checked the scope and mounts and even tried a different scope with no improvements. Also cleaned it thoroughly which didn’t help either. He also ran a dollar Bill around the barren and there was no binding there.

What should we be looking for with the crown? It does have a heavy barrel with a pretty deeply recessed crown.

I do reload a little so I can work him up some loads if it would help, that’s why I’m asking which bullets would be best. I suspected a lighter/shorter bullet would help but you guys are much more knowledgeable about that than me so thought I’d seek advice here.

Thanks for your help so far

 

[243winxb]

I suspected a lighter/shorter bullet would help

My 18" bbl ,10 twist 243 does better with shorter bullets. Reload some Sierra 85 gr hpbt #1530 bullets.

https://bergerbullets.com/twist-rate-calculator/

 

[Bfh_auto]

1-10 twist will stabilize everything except the eld elr type bullets.
Try something with a flat base.
Do the cleaning and tightening that was recommended by several people.
You can also try switching scopes.

 

[Blue68f100]

When you cleaned your barrel did you use a copper solvent? Most standard gun cleaners do not remove copper. Use something like Sweets.

A look with a bore scope may be in order. Hopefully it want look like this SS barrel. This was taken near the muzzle end, it gets worst close to the chamber you get.

 

[JustSomeGuy264]

When you cleaned your barrel did you use a copper solvent? Most standard gun cleaners do not remove copper. Use something like Sweets.

A look with a bore scope may be in order. Hopefully it want look like this SS barrel. This was taken near the muzzle end, it gets worst close to the chamber you get.

View attachment 949433

I wasn't there when they cleaned it so I dont know what they used. I'll pass the info along and see how it goes.

 

[Jerry M]

How many rounds through the barrel? If it's a high round count or has been scrubbed from the muzzle end for decades; with a steel cleaning rod; it may be time for a new barrel.