338 lapua woes.

[Commander Shepard]

Re: 338 lapua woes.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: biscuit_75</div><div class="ubbcode-body">i agree fully its stupid for it to group 5" at 200 and 1 5/8 at 500 yds.</div></div>

Its not just stupid, its impossible, bullets aren't guided. If its shooting 5" groups at 200 yards, it'll achieve around 12.5" groups at 500 yards. That is just the way geometry and random distribution work.

If you got a less than 2" 500 yard group with that same rifle then you didn't use a large enough sample. Shoot a couple of 5 shot strings at 500 yards and see what they average at.

 

[sharac]

Re: 338 lapua woes.

I'd bet a parallax problem and gets sorted out at 500y...

There is NO way to have an error so great because of bullet being over stable (nose AOA towards flight path) or to have bullet which is unstable stabilized later on...

 

[Commander Shepard]

Re: 338 lapua woes.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Sharac</div><div class="ubbcode-body">I'd bet a parallax problem and gets sorted out at 500y...

There is NO way to have an error so great because of bullet being over stable (nose AOA towards flight path) or to have bullet which is unstable stabilized later on...

</div></div>

Agreed, parallax is the most likely explanation. Also agreed on part 2, over-stabilized bullets with induced AOA can create some disparity between short and long range groups, but not to the extent observed here.

 

[Da-Law-Dawg]

Re: 338 lapua woes.

I think the the history with the 700 MLR's have been hit and miss.....either you have one that'll shoot lights out or not at all.

My MLR was manufactured last quarter of '09 and has been a solid tack-driver. Prior to being fired, I installed a Badger FTE, bedded the factory HS stock and lapped the barrel.

Here it was prior to her first trip to the range for break-in.....

She was fired and cleaned the first five rounds to check for copper fouling with factory 250gr Lapua Scenar ammo. After the initial five shots, I fired my first group for a base-line for accuracy. Five rounds later, here was the outcome......

Needless to say, I was well pleased and set out on load development. A short time later, I found she really liked a 250 SMK over 88.0gr of RL-19. Later switched to an XLR chassis and went with a 8.5x25 MK4 to replace the Burris glass that was originally on her........

My particular rifle has been sub-MOA from 100 yards and out. I recently had the opportunity to run her to 1525 yards and couldn't be happier. Guess I was one of the lucky ones and got a shooter.

 

[Intrepid4576]

Re: 338 lapua woes.

subtracting the .339 for the caliber of a 338lm groups is something i never thought to do... ( im new ) is that standard practice when talking about group size?

Ive been bothered that i never did better than .76 in groups but if i subtract the bullet size im sub .5 moa which would be neat....the idea just seems kinda like cheatin

 

[Early Cuyler]

Re: 338 lapua woes.

I thought so too, intrepid. However, subtracting the bullet diameter gives to the center to center grouping. This is a better indication of how accurate your rifle is as well as your skill. It also allows an objective comparison to be made with rifles of different calibers.

If I shoot my 22LR and get a 100yd group of .48" then that is phenomenal (not to mention impossible with my skill set right now). But if I shoot my 50BMG and get a 3 shot group in one exact hole (again, dreaming), my group would be .5". So if I want to compare them, my 22 would appear to be more accurate on that basis which is ridiculous and why we subtract the bullet diameter.

 

[Intrepid4576]

Re: 338 lapua woes.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: halcyon575</div><div class="ubbcode-body">I thought so too, intrepid. However, subtracting the bullet diameter gives to the center to center grouping. This is a better indication of how accurate your rifle is as well as your skill. It also allows an objective comparison to be made with rifles of different calibers.

If I shoot my 22LR and get a 100yd group of .48" then that is phenomenal (not to mention impossible with my skill set right now). But if I shoot my 50BMG and get a 3 shot group in one exact hole (again, dreaming), my group would be .5". So if I want to compare them, my 22 would appear to be more accurate on that basis which is ridiculous and why we subtract the bullet diameter. </div></div>

Thanks for the excellent explanation halcyon - it makes perfect sense to me now

and im happier ive shot .46 groups lol ... i was honestly a bit annoyed with myself for not getting sub .5moa

 

[biscuit75camaro]

Re: 338 lapua woes.

how do you like that badger brake law dawg? ive been thinking of getting a new brake. how much does it reduce recoil? the factory brake will literally cause a dust storm if shooting prone without something under the brake lol.

 

[Da-Law-Dawg]

Re: 338 lapua woes.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: biscuit_75</div><div class="ubbcode-body">how do you like that badger brake law dawg? ive been thinking of getting a new brake. how much does it reduce recoil? the factory brake will literally cause a dust storm if shooting prone without something under the brake lol. </div></div>

biscuit,

The FTE is wonderful on the .338. Comparing recoil, its no worse than an unbraked .308. I shoot prone 99% of the time and have never had any problem with it blowing up debris. Recoil reduction is far better than the radial brake installed at the factory. I never fired mine with the factory brake, but have fired a friends. Comparing the two, mines a joy to shoot.