OzFclass

Anyone have success using 2213sc, 175gn Sierras in a .284win that would care to share some info. Like, load data and seating preferences.
I have a lot of 2213sc and Sierras to use due to the lack of 180 Berger VLD's.
thanks Geoff

Am using some today at the range in a 7x57 AI .Savage action Madco barrel. have been using Berger 168gn with great grouping
Bill.

I would be interested to know how the 7x57AI goes.

Hi Geoff,
I found 56gr. 2213sc. with.o40 jump worked in my Maddco barrel. I have a bulk pack of 500 180 gr. Sierra M/K. if you are interested in swapping for 500 175gr. Sierra M/K. if you are interested.
Cheers,
Trevor

Thanks Trevor,
I'll stick with the 175's for now. Last week I tried 55.8 .010" jammed = big group then 56 with .010" jammed was ok but was wondering if they might prefer jumping to group better. I only have 476 left to play with for club shoots.
I'll try jumping them next.
thanks
Geoff

I'd also try them just touching. I know some reckon touching is inviting trouble, but I've found a few instances with tangent ogives where it works well. I'll be trying Ken Melgaard's 178gn 7mms this weekend at 8-900. They're very similar in design to the SMK 175s, and I'll have them touching. Will probably use a light load of 2209.

Im with Alan . Load was 52.6 of 2213sc cci large rifle primers 175gn Sierras just touching lands
First few at 100yds All touching 2nd group at 200yds all within 1 inch , no elevation difference
only a bit of windage that was me. will defiantly be buying more to experiment with
Bill

Alan,
Just touching worked quite well, shot very well on target with an SD of 22 @ 2950fps but I wouldn't go any higher. Primer pockets still tight , primers were flat, so I may experiment with less powder now.

Rebel105 wrote:Alan,
Just touching worked quite well, shot very well on target with an SD of 22 @ 2950fps but I wouldn't go any higher. Primer pockets still tight , primers were flat, so I may experiment with less powder now.

Good for you, Mine didn't go well at all - what the wind didn't get the vertical stepped in to make sure the flogging was complete . My excuse is that the barrel, which has never been reliable, may be too loose in the bore for the projectile. Another shooter got good results with the same projectile. I tried jamming as well with minimal improvement.

Tried the 175 sierras at 600yds Saturday they were all over the place not 1 centre lucky to score 50, There were elevation changes that could not be explained
Next round at same range same day and conditions used the 168 Bergers and shot 59.5 and I threw away the 1 shot will stick with the Bergers
Bill

It seems that a lot of people including myself are having to try different brands and types of projectiles with the current component shortage. This is resulting in a lot of head scratching.

I have found that when a chamber is set up with its throat length designed for the Berger' VLD and some Hybrids, that some other bullets including some Sierra's, Nosler Custom Comp, Barnes Match Burners and Hornady's do not shoot so well. These bullets have tangent ogives. They also tend to have a longer bearing surface.

This combination of tangent ogive and long bearing surface means that the bullets will often be required to have part of the bearing surface seated at or below the case neck shoulder junction. This can result in variations in the case grip on the projectile from one shot to another.

When seating these projectiles you may notice a difference in the force required to seat the projectiles compared to a shorter bearing surface Berger projectile. If you do, it may pay to skim a little off the necks and turn right down into the donut area. Even if you have a no neck turn chamber! I did this recently with some 6mmDasher cases when trying to get 105gn Hornady BTHP match projectiles to shoot. Accuracy immediately improved.

Going up one size in your neck sizing bushing may also help identify the issue. Have a play with a larger neck size bushing. The bullet should be very easy to seat. But if you notice an increase in the force required at the top of the loading press stroke, then this indicates a tight area at the neck shoulder junction.

A permanent option if you intend to keep shooting a particular, long shank projectile is to have the chamber re-cut with a reamer that suits the projectile and permits the projectile to be seated out further and away from the neck shoulder junction. But this is a tough choice to make with no guarantee that it will work.