1 in 7 twist question

KDX

KDX

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I have a Model 12 LPV .223 on order for almost 3 months now that has a 1 in 9 twist barrel. I was informed that I could have the same rifle with a 1 in 7 twist next week if I wanted it. I have 1000 50gr Vmax bullets sitting in the basement waiting for this rifle. Would the 1 in 7 twist be too much for these bullets or is there such a thing as too much stability? I really have no interest in shooting the heavier bullets.
 
With some faster twists if you get the lighter fragile bullets going too fast they can come apart in flight due to the high rate of rotation. That is the only concern you might have...

I'm personally not sure if this would be an issue with that combo or not though.
 
55 V-Max is perfect for 1:9 barrels. They will shoot fine in 1:7 as well. You'll only need the 1:7 if you want to shoot 75-90gr bullets, otherwise, just stick with the 1:9. It will shoot anything up to 69gr just fine and probably even 75gr.
 
I would take the 1:7 just in case you ever want to shoot the heavy bullets at long range. With 75-90 gr bullets you will be good to go out to 1000 yards or better.
 
My 1:7 LRPV shoots everything from 40grainers to 80grainers quite well. I have loaded some 40 grain Blitzkings at 3740 fps and they shoot very accurately.

I did try some 46 grain winchester HPs that have a massive hollow point that came apart when pushed to these velocities.

Most polymer tips stay intact. My experience has been the hollow points come apart when rpm and velocity get up there.
 
I have the LRPV .223 with a 1:7 barrel. I read an article that said to keep any 55gr or less bullet under 3000fps. Mostly I shoot Sierra 80's.
 
The 1-7 will throw them ok but it's a bit over kill, shoot up the 55's with the 1-7 and start buying heavier ones next. 1000 doesn't last long.
Regarding the little bullets coming apart i've heard the same thing from a few people but i've never seen it happen (same idea as my wife paying her own bar tab, i've heard of it but never seen it.)
I was shooting a 220 Swift , pushing 40 gr hornady varmint bullets at 4350 fps on average, some peak hot loads at 4411 and NEVER SAW ONE COME APART, i think they call that an urban legend or something like that. I'd love to have someone show me it happen.
Buy the 1-7 load heavier bullets and move back farther you,ll appreciate it more later.

M.
 
what is the expected wait time on getting the rifle with 1 in 9" twist?
I'm sure you'd be able to sell the 50 gr. bullets on the EE easily and pick up some a bit heavier.
When I re-barrel my .223 eventually, it'll have a 1 in 7" or 1 in 8" twist. On one hand if you don't want to shoot heavier bullets go 1 in 9" but if you have to wait all summer to get it............
 
KDX you get that 1/7 Twist, and sell those Hornady's get some 69gr sierras or 80gr or 75 & 80gr Bergers. Like Maynard said you can go to 1000 very nicely.
We have informal shoots at range every second Sunday at 200 & 300 y and with poor conditions and gusty winds, fellows shooting 50 & 55gr bullets in 223 & 22- 250 are completly lost all over the paper. Those 1/7 using 75 & up bullets just keep winning.The only chance those 50gr have a chance is when there is O wind and if they try and streach out to 600 they just don't run with the big bullets with the high BC.
 
You've probably got too much twist to drive thin skinned bullets at top velocity, but you won't know until you try them. In reality you bought the wrong rifle if what you wanted to do was shoot light bullets at 100 yards.
 
I had a 1:7 .222 built. Blitz and SX bullets would come apart in the air. When I wanted to shoot light bullets I chose 52 gr MK, and they shot lexceptionally well, despite the fast twist. If it was my nickel, the 1:7 barrel would be my preference to the 1:9 if both barrels were of similar quality.
 
Thanks for all the replys. I ordered the 1 in 7 twist and will be looking for some heavier Vmax bullets.
 
.330 Dakota , hey i understand the idea and it sounds neat but, I still wanna see it happen. I did my damndest to send the smallest bullets down range the fastest to get them to the targets faster and used 40 gr VARMINT bullets (known for opening fast and easy) down range , sometimes hot loads clocking 4411 fps and the always stayed intact. While i hear guys with 2900ish speeds and bigger better bullets telling me nope, didn't miss, the bullet must have blown up. Show me I'd like to see what it takes.

M.
 
Using very light bullets in a tight twist barrel like that will cause pressures to be higher, and they will tend to be over-spun.

I would frankly wait for the 1:9 as it will give you a much wider selection of bullets that can be shot well. Go for the speed over the BC and have fun.
 
Once again thanks for all the replys. I guess I should have been clearer in my original post and stated that the rifle will be used mainly for gophers and paper out to about 300 yards. I probably should have posted it in the reloading or hunting forums, but thought I would get a better response here. I had used 52gr Hornady bullets in a Tikka with a 1 in 8 twist barrel with great accuracy so I have my fingers crossed with the 50gr Vmax bullets. I posted an ad looking for 68gr Hornady HPBT Match bullets and have been phoning around trying to source some out. The 50gr Vmax has a BC of .242 and the 68gr BTHP Match has a BC of .355, I was wondering if there would be much of a difference at 300 yards with a moderate cross wind between the two.
 
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