22250 loading problem

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rem22long40x

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We are loading Nos.custom comp. bullets at 52gr. [thy are almost the same as match kings] , with 34gr.BLC2 we were loading at max over all recommended length and do to the O-jive of the bullet they were way off the rifling . So we seated one way long and chambered the round to seat the bullet to tuch the rifling and then measured it and then seated it .002 deeper and this helped the grouping and overall accuracy . is this round notoriously finicky ? is .002 fare eungh off of the rifling or should we go deeper ? thanks David
 
If only .002" off lands helps accuracy that much, I would experiment as far as .020" in small increments. Unless the manufacturer recommends something different (Berger Bullets), I would find if there is a better 'sweet spot' especially if loading for a versatile cartridge like .22-250.
 
If you are only using a caliper to attain COAL, and not a true bullet comparator, then the .002" that you think that you are getting, can actually be +- what ever the manufacturing tolerances of the bullet happens to be.
You should maintain at least a caliber of bullet depth in the case for proper case tension. You don't see factory ammo seated way out, and often they will give great groups. The point being that you need to strike a balance of COAL, unless you have a custom chambering and throat.



NCsmitty
 
My .22-250 is a box-stock Rem.M700ADL synthetic. It, with ammo it "likes" shoot sub-1/2" at 100yds. (most acc. centerfire I own, or have ever owned...)

It "likes" a Sierra or similar quality bullet (Nosler, Berger, Speer) seated to SAAMI max. of 2.350" oal. This is somewhat shorter than to the lands which is about 2.400" depending on bullet.

Like previous poster stated, with most production rifles, you'll likely get better accuracy by seating the bullet deeper to ensure adquate strength of bullet "pull", and alignment provided by a deeper seating depth. Run-out or "wobble" of loaded ammo means more often than absolute over-all length.

I have a Ruger M77/22Hornet that is characature of this concept. It shoots best with bullets seated to, or deeper than SAAMI which is very short @ 1.732"oal, though to seat most bullets to grooves is around 1.84". 1.780" is the longest the magazine will accept and feed. The rifle however has such a sloppy cut chamber such that it shoots best with full-length sized and deep seated bullets such that they "lie" in the chamber consistently rather than sized to fit the chamber, which is also out-of-round, such that a partially sized case will be "sized" out of round if not exactly aligned in the chamber as was when it was last fired....... But, with ammo it "likes", It'll shoot 1.0-1.5MOA.... It's probably going to be sent off and re-barreled to .17 Hornady-Hornet...... So as to start with a clean slate......

You have to experiment to find exactly what your rifle "needs".....
I've got a Remington M7 in .260 that wants the brass "snug" and the bullets touching the lands and about 5% below max. Difference between "factory" spec's. and reloaded specs is 3"+ groups and sub-1" 5-shot groups at 100yds...... It took several hundred rounds reloaded and fired to establish this pattern with this rifle......
But, my Rem.M-7 in 7mm08 is a totally different animal and no-where as accurate as the .260. Go figure.....!
 
Long(oal) is not necessarily better nor is a max load going to provide the best accuracy all my rifles tend to do better at 92% of max but it varies from gun to gun,sometimes it's a long process but to me that is the fun part.;)
 
well it is shooting the bull dot on a1in.sticker target at 100yd.s I shot 2 3 round groups that 2 in one hole and the 3rd. cut it half way into that hole. we are going to play with it some more but I think that will be hard to in prove on with that bullet , but we are going to try some others out this week that have a different O jive .Thanks David
 
Just so you know, or maybe you do:
O Jive is actually Ogive.

Bullet Ogive = bullet ogive is defined as the “curve of a bullet’s forward section” and can be expressed as a tangent ogive or secant ogive.

rc
 
I've owned four Rem 700 VLS,VLSSS's, all of them preferd the bullets(mostly Sierra Varminteers or Hornady V-Max's) at .010 off lands +/- .Any time I tried to seat bullets shorter the groups opened up,not a whole lot but enough for me to not do it.
 
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