another twist question

[rocky_lange]

First, let me swell your heads. I joined this site/forum because it seems some of you are the most intelligent and knowledged individuals on the net dealing with 6mm information.

Now, I just joined about 1 minute ago, so if this has been answered before in some other post, I appoligize.
Midway's website showed a 1-10 twist for the 105 AMax. But, when the box arrived at the house, it reads 1-9 twist. The rifle I intend to load these in is a DPMS LR243 with a 1-10 twist 20" barrel. Will they work? I don't want to crack open the new box to try a few if they are not going to stabalize. Being an AR type rifle with a 20" barrel, I don't know if I can push them fast enough to do it.

So, am I screwed with what I got?

Rocky

 

[FroggyOne2]

Yes Sir.. Midway at their finest.. send them back.

 

[fdshuster]

What-a-deal! Midway screws up, yet again, and the purchaser gets to pay the return shipping cost. I would first contact them by phone, ask to speak to the manager, not the "phone person", and demand that they pay return shipping charges. Midway was once a great company to buy from; I'm gradually changing my opinion. Also, seems that whatever you try & order, it's always "out-of-stock, on back order". Sorry Midway, but you've let your success go to your head.

 

[rocky_lange]

Well, technically, I never said I ordered from Midway. I only used their website's description of the bullets as a reference tool. I ordered them through Midsouth Shooters Supply. They were almost $2.50 cheaper.

I guess I'll have to find a local shooter who wants to buy/trade them.

Rocky

 

[Winchester69]

www.snipershide.net/forum/ubbthreads.php?ubb=showflat&Number=655598#Post655598
.

 

[CPorter]

A 10 twist probably won't work well but they probably won't keyhole badly. It will depend on altitude, humidity, temperature and the actual twist rate of the barrel. I have a 12 twist and sometimes it will shoot 90gr ballistic tips just fine. The rest of the time the groups open up a bit but it will still shoot them. My girl friends .243 has a 10 twist as well and it would shoot the 105s but wouldn't shoot them as well as the 87 VMax.

 

[Ackman]

You're planning to return one box of bullets?

 

[rocky_lange]

No, I probably won't return them. I don't want to open the box either and find that they won't fly. With only a 20" barrel I don't think I have enough barrel to get enough spin on it or enough barrel to get the velocity up high enough to over come the lack of twist.

I guess I am going to try to find someone locally who has a box of something to trade.

What suggestions do you have for a 20" 1-10 twist? I was looking at the 90 Berger Match BT, Hornady 87 VMax, Hornady 85 Accubond or Barnes 85 TSX. I want to stay a little heavier for a possible deer round,the VMax woundn't be used on deer, paper only).

Rocky

 

[rocky_lange]

I am like a kid with a candy bar. You leave it in my sight for too long and I will open it. So, I loaded 5 rounds to max listed charge and let em rip. 5 MOA group @ 100 yards, but no keyholes and no presure signs. I did get 2 out of 3 10 rounds groups sub MOA with 75 gr HornDaddy HPFB.

Oh well, It was worth a try.

Rocky

 

[BigJim]

Rocky if you have H4895 powder use that for your 105 grain bullets. Back the load off .5 grain and make sure you are using the recommended OAL. Your 1 in 9 twist should not make any difference on the bullet since there is a range that they will stablize not just one weight.

The standard is 1 in 10 twist for a 243. Make sure you do not have a 243 AI that would require a different load. I would question what the actual twist is in your barrel,Call DPMS) you might find out that it is not what you think. The only reason to use a 1 in 9 twist is to stablize heavier bullets, you may want to try 107gr bullets instead.

Good luck and good shooting
Jim

 

[RonAKA]

With only a 20" barrel I don't think I have enough barrel to get enough spin on it or enough barrel to get the velocity up high enough to over come the lack of twist.
What suggestions do you have for a 20" 1-10 twist? I was looking at the 90 Berger Match BT, Hornady 87 VMax, Hornady 85 Accubond or Barnes 85 TSX. I want to stay a little heavier for a possible deer round,the VMax woundn't be used on deer, paper only).

It is bullet length that primarily determines the spin you need. Velocity does not change things that much. Your 1:10 should be good up to 90-100 grains depending on the shape of the bullet. Boat tails are going to be longer, as are match and VLD bullets. I believe the VMax is also long for it's weight. The Barnes are not likely to be a good choice either as they are copper and since copper is less dense than lead they will be long for the weight. I believe Barnes gives the required twist for their bullets on their website, as does Berger.

Your best choice for hunting at least is a flat base bullet with all lead core if you want to try 100 grain. Sierra make some. If you want the Nosler Partition, it may pay to back off to the 85 grain as they have a solid waist that isn't lead and the bullet is likely to be longer.

In the 85 and less bullet weight just about anything should work.

Ron