Posted on 09/14/2018 5:06:43 AM PDT by w1n1
Have you ever thought making that 1 mile shot possible?
If you’re into long range shooting take a look at this Mossberg MVP Precision rifle.
You don't have to be part of the elite F-Class shooters where their rifles are custom custom made.
The Mossberg MVP chambered in 6.5 Creedmoor or 7.62 NATO (308) round embedded on a tactical platform will definitely turn some heads.
Mossberg MVP Precision rifle features:
Word has it that Mossberg went back to the drawing board to design its own modular aluminum chassis system.
Similar to the AR-rifle “inline” design, the Mossberg chassis more efficiently handles recoil and lessens internal stress as energy is transferred in a straight line between the barrel and action to the buffer tube/stock; inherently increasing accuracy and the ability to maintain your sight picture. Oh yeh, what about that 1 mile shot? - go here to see this Mossberg MVP Precision rifle in action.
Townsend Whelen
bttt
I wonder why the difference in barrel length and twist? I have been quite impressed with the ballistics of the 6.5 Creedmore and I am a dyed in the wool 7.62 advocate, but am considering making the change.
I want one in .300 WinMag.
The 6.5 family benefits from high BC bullets in medium weight, while the 30 Cal’s needs 220+ grn bullets to get the same BC so the net is lots more recoil to get the same external ballistics, minus energy. The trend in 308 is short bbls as more folk add suppression, and the 308 gets near optimal internal ballistics from bbls in the mid length as well.
Some 140 grn class 6.5 bullets approach .700 g1, while the similar weight 30s are under .400.
The 6.5 family benefits from high BC bullets in medium weight, while the 30 Cal’s needs 220+ grn bullets to get the same BC so the net is lots more recoil to get the same external ballistics, minus energy. The trend in 308 is short bbls as more folk add suppression, and the 308 gets near optimal internal ballistics from bbls in the mid length as well.
Some 140 grn class 6.5 bullets approach .700 g1, while the similar weight 30s are under .400.
School of thought on the 7.62 says you need the 1:10 twist to properly stabilize the heavier bullets of 180+ grains. I can vouch for that in the two 7.62 rifles I have. If you have a 1:12 twist 7.62 that just doesn't seem to hold a good group at long distance despite everything else you've tried, consider dropping your bullet weight down to 150-160 grains.
I opt for 158 grains on nearly all of my rounds. I have one box of 165 grains but am loathe to use them.
Now, if they would guarantee it to be sub .5 MOA with premium ammo, then I would be really impressed. There are several off-the-shelf rifles out there at half the price of this one that will hold sub 1 MOA with good ammo. I own two 7.62 off-the shelf rifles that will that I paid less than $400 each at the time. But, good ammo is the key.
This doesn’t look like it was written by a pre-schooler. From what source did you plagiarize this column?
Well, looky here. Word for word.
If the Right were as dastardly as the Left claims, this would be an ominous development for groups like BLM and Antifa.
Actually, the original US 30 caliber rifles used the 1-10 twist to stabilize the 220 grn ball bullets of the day- think 30-40 Krag and the M1903 rounds. Both pushed the same 220 round nose , the former at about 2100 fs, the latter at about 2400. Since bullet rotation is a function of twist rate and velocity, the 1-10 was need to stabilize the rather long bullet. Bullet stability s a function of bullet length, not necessarily weight, and rotational velocity.
Fast forward to the M1906 30US M1 round ( 30/06 Springfield) originally is fired a 173 grain BT spitzer bullet at around 2600 fps, so the 1-10 twist was still appropriate, and then a bit later, the M2 ball was introduced to reduce the range of the M1903 rifles- they were exceeding the limits of firing ranges due to the very good performance of the M1 173 grn round.
So, even up till the M1 days, the US standard 30 cal twist was kept at 1-10. The M14 was changed to 1-12 as the only rounds approved for the M14 were 147-150 grain ball ( M80), but the match rounds ( M852) were updated to fire the 168 and later still the 175 grn Sierra Match Kings, and the 173 grn M118 Special Ball for sniper use.
In reality, a 1-11 or 1-12 30 cal is adequate to stabilize long BH spitzer bullets up to 190 grn w/o issue.
A bullet needs to be rotated at least fast enough to be stabilized and that varies with caliber and length of bullet, so for the 30s, about 185,000 rpm is needed.
Here is a formula you can plug and play with:
http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi
Have you heard anything or have any impressions on the .224 Valkyrie ????
Not really my cup of tea, but of course the 224 V is a step up over the 223 in the AR platform. My dislikes are: rebated rim- I see potential feeding problems/magazine issues, too long for use with high BC 224 bullets, but not certain of case length. from what I read, realistic improvements are of note, but there are even better cases out there. One might look at Keystone Accuracy’s 220Thunderbolt- based on a steeper shouldered slightly modified 6.8 SPC necked to 224, pushes a mag length 80SMK at well over 3000, uses 6.8 mags. Runs 75/77 weight bullets to 32-3300 with ease. Pushes the 90s to near 3000 at over mag length for single shot operations.
Of course, it is a wildcat and John Scandale’s ( proprietor of Keystone) Whidden made dies cost a bit too.
Here is a link to Keystone- Scandale is a world class target shooter- All Guard for years, top contender in the NRA/CMP world, now a producer of custom stuff. Great reputation among us High Power types.
https://www.keystoneaccuracy.com/the-220-thunderbolt.html
If you contact John, tell him Andrew065 sent you, he give you a discount (probably not...)
Actually, I stand corrected, the 220 TB is not based on the 6.8, it is based on the 6 Hagar ( a bit longer than the 6.8),but it shares the 6.8/30 rem head diameter of .420 vice the 224 V .373 rebated rim design.
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