Home Forums Reloading Big Game Rifles 270win 150 LRAB according to nosler

I had to call and get some advice from the mfr after the last flop on the 150's. The information I received was that the 150's really want to jump. The groups that I was getting were essentially a group in a group and the tech explained that the ab tends to hang up in the throat on sharp rifles, worn throats and Weatherby rifles tend to shoot it better.

Faster powders or crimps with big jumps are what make this bullet shine. I've been using rl26 which is slow to build and perhaps this holds true. The powders suggested were magpro, rl 22 and 7828. Magpro was told to shine due to its lubricity.....we'll see.

I am going to crimp these @ the groove and see what happens and feed it some of the powder suggestions.

Right now I am working with them in a new .270 and accuracy has been so-so.

I will try giving them a 0.01" jump and see.

Thank you and good luck with them!

The advice of the tech was to seat them to the groove, which in my rifle is close to. 2". He said they will almost never shoot worse seated deeper.

The same applies to the etip.

What groove are you talking about? Cannelure ring? My .277 150g LRAB's don't have one. Using 7828 in my .270 Wtby. Mag. Mark V Accumark the accuracy was around 1.5-2". Unimpressive to say the least. I am planning on trying some other powders.

Crimping a LR load?

Never would have crossed my mind.

Did Nosler suggest a crimp?

That's all very interesting, but so far hasn't matched my admittedly limited experience.

Have tried the 150 ABLR in two .270's, a Ruger No. 1B and a BACO Model 70 Featherweight. They shot great from the No. 1 when seated close to the lands, but the Model 70's magazine length prevents them from being seated close. So far haven't had any luck with several different powders in the M70--which shoots both 150 Hornady Interlocks and Partitions very well, using powders from H4831 to Reloder 26.

John,

I realize that your the professional and I'm not.

But if my 270 shot well with Hornady Interlocks and Partitions,I'd smile and be happy. Very happy.

If a critter is to far off to kill with one of those bullets,he's too far for me to shoot at.

Which is why the .270 hunting ammo I have loaded up is filled with Interlocks and Partitions.

Me too so it's gotta be good!

Yes they did.

They also suggested magpro with a magnum primer. The theory is that the bullet entry to the lands is inconsistent due to the way it acts in the leade. Some bullets get to the lands in motion, some stop for a second as pressure builds. I have to believe it after watching the groups and chronograph readings I had. He described my situation perfectly without me giving him any hints.

He said magpro has some lubricity to it? I'm wondering if I seat deep, crimp and moly coat if this will come together with 26. He thought it should.

He did say that seating close to the lands should make for an accurate load, but the ogive and chamber design would never allow it in a stock rifle.

I shot the .270 again today loaded with Magnum and MRP with two diferent seating lengths: one with a .08" jump and the other with a .015".
MRP loads shot tighter, and quite well, around 0.6-0.7 moas for four shot groups, regardless the seating depth. Impact varied a little but group sizes were identical.
Speed was 2,885 fps and my next loads will be with 0.8gr more powder with the hope that n o accuracy is lost.

What rifle and how many rounds through it?

High Country:

Rifle is a Blaser K95, brand new, last shot from yesterday was number 50.

Do you or anyone know if they run a long freebore like Weatherby?

I was at the range last weekend, was getting 1" 3 shot groups with Retumbo just off the lands. (270 WSM)

My different K95 barrels (currently 22-250, 6XC, 6.5x57R, .270WCF and 7x57R, are not freebored any longer than their SAAMI or CIP specifications except for a 25-06 that I no longer own.

Today I made one last hurrah for the 150 LRAB using the 26 with mag primers and a crimp and a batch of magpro.

The crimp helped. It went about 1.5" down from 3 or more inches before.

The magpro ripped the kind of group I'm used to this rifle shooting.

Yay!

I played with them

That looks really good, I found in my 260 Rem with the 129's they also did quite well seated deep. Really want to try the 150's in my 270 Win this year........

R-26 might get them to 3,000 fps. That was as much 4831SC as I could get in the case.