philevans
Member
have a sport with 1 in 8 5R melonite barrel, with hand loads shot .7145moa - best ever.
does the newer sport with 1 in 9 twist barrels shoot as good?
does the newer sport with 1 in 9 twist barrels shoot as good?
1 in 8 vs 1 in 9
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BillyJack2012
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I think you need to get one and tell us. 
Smitty357
Member
The heavy the load, the more accurate the 1/8 will be. The lighter the load, the more accurate the 1/9 will be.
I built my .300 ACC with a 1/7 twist barrel. Just to accommodate for the 110GR and heavier loads. Subsonic is just crazy with a 1/7.
I built my .300 ACC with a 1/7 twist barrel. Just to accommodate for the 110GR and heavier loads. Subsonic is just crazy with a 1/7.
I have shot the 1/8 sport and the OR, which has a 1/9 barrel, back to back using a lead sled and hand loaded ammo. I have not shot them using factory ammo as they shot my reloads quite well. I was using 55 grain Hornady vmax bullets with Varget powder. There was a difference between the barrels as far as accuracy. The sport shot a 3 shot group smaller than a dime at 100 yards. The OR, using the same ammo, shot a group the size of a nickel at 100 yards. Having said that, I am happy with the results from both guns.
BTW- Both guns are topped with a Nikon P223 3x9x40 BDC scope also.
BTW- Both guns are topped with a Nikon P223 3x9x40 BDC scope also.
Vinney47
Member
so for that load the 1/8 was more accurate. good info but far from comprehensive on which is better. probably isn't an answer for that.
Yeah vinney I know you have posted that before when I have put this reply in another similar thread. I am not going out and buying different factory loads just to see if I can find one that works better in the OR.
I loaded this load according to the Hornady book. I also used a medium load since my 14 year old son is shooting the sport. I wanted a load that was not too hot. I tried it using Hornady 55 gr Vmax with 24.6 gr of powder to produce 3000 fps according to the Hornady book.
I made up about 25 rounds and shot them through the sport first as I did not have the OR yet. I wondered how good they would shoot through the OR so I tested them back to back. Short of testing several brands and bullets of various weights, I thought this was a pretty fair test. Both guns shot the same load, off of a Caldwell lead sled, using the same Nikon model of scope on each one at the same distance.
I am just reporting what I found out. I knew when I first posted this info on a previous thread that someone would find fault with it. My suggestion is for you to perform your own test and let us know. I considered the 55 gr vmax bullet with Varget powder to be a pretty good all round load. That combo is what I have on hand and that is what I am going to use.
Vinney47
Member
There is no fault with your data. Only in that you present it as proof positive that one barrel is more accurate than another. That type of insinuation NEEDS clarification. Just word it different so that it's clear that your results show that a particular load is more accurate in a certain barrel, and not that a certain barrel is more accurate because of a particular load.
I just considered it a general load not one worked up specifically for my Sport. I loaded up 25 rounds initially and went out and shot it. I had some pretty good groups with it so I decided to load up a bunch of it. I had 1000 rounds loaded up prior to Dec.
When I bought the OR I was wondering how it would shoot so I took it out to sight in the scope. My son wanted to shooting so I took his Sport as well. We shot both of them. He outshot me with his Sport. After he beat me, I shot the Sport just to see if it was me since I am a lot older and wear glasses. My group was just as good as his.
So you asked if there was any comparison between the two and I responded. If anyone else cares to respond with their own results jump right in. I posted what I know.
If anyone wants to send me some ammo I will be glad to shoot and compare them. I will post pics too.
If I sound bias, then I guess I am because I honestly think the 1/8 barrel has raised the bar in regard to accuracy with an AR.
BTW- I wonder why Nosler is using the 1/8 in their high dollar rifle? Hmmm....
MichiganScott
Member
1-8,1-9,1-7, doesn't make a rats butt difference in the real
world,of course I understand a lot of us don't live in the
Real worldPete
Agree totally, until you get to bullet weights of 75gr. or more. It then becomes a bullet stabilization thing.
cyphertext
US Veteran
1-8,1-9,1-7, doesn't make a rats butt difference in the real
world,of course I understand a lot of us don't live in the
Real world
It's not just the twist rate of the 1:8 barrel, but the rifling. Considering that S&W states that the Sport is the "entry level" rifle and now has a non 5R barrel, and the 5R barrels are only available on their "premium" (their word, not mine) rifles, there must be something to the claim that the 5R is better.
How much better? Who knows, and no one here is going to do a test with enough ammo and enough different specimens to make that determination. However, the 5R barrel takes longer to produce and is more expensive.
boudin
Member
barrel on my m&p 15 sport is stamped - 5.56 nato 1/8 5R. bought it last year
