Nosler Accubond Long Range problem

[royinidaho]

That'd make'm WOOF at 3500'

Them'air woofs are at 10,000'. Those bullets if they prove out, should be like lazers to about 1200 yds. However, from my last wolf sighting in the area, the longest shot will be less than 500 yards.

Wonder if they are furred up at all. Should be decent by Halloween. I'll not be wasting a tag on a mangy one. IYGMD (If U get my drift)

 

[elkaholic]

Them'air woofs are at 10,000'. Those bullets if they prove out, should be like lazers to about 1200 yds. However, from my last wolf sighting in the area, the longest shot will be less than 500 yards.

Wonder if they are furred up at all. Should be decent by Halloween. I'll not be wasting a tag on a mangy one. IYGMD (If U get my drift)

Ifn ituz me, I'd probly line up someofum, IYGMD

 

[Engineering101]

Kirby

It is not good that some folks are having issues with the ABLRs. Also, it is pretty surprising the weight loss they show at higher velocity.

As you and I suspected, changing to the new heavy magnum bolt head did not improve the accuracy of the 270 WSM barrel using the 150 gr ABLRs. At 200 yards, it put 5 into 3.3 inches while averaging around 2,900 fps on the chrono. There were 2 clusters spread diagonally. If that was the worst it shot there would be hope to make it better but that appears to be about the best it shoots. It shot the Ballistic Tips a bit better with some 2.25" groups but I don't see myself settling for that when I've got several rifles that will do 0.75" at 200 yards.

While letting the 270 WSM cool, I was running some bullet seating depth tests with the 300 RUM and 200 grain Barnes LRXs. That rifle has a very similar 26" stainless barrel barrel and it doesn't seem to have any issues. The best group (seated 0.020" off) ran 0.281" at 200 yards. I'm pretty sure it won't do that again since I can't shoot that good but it sure makes you wonder how the same barrel in 270 WSM won't shoot.

I think I'll turn the 270 WSM back into a 260 Rem just to reprove that it shoots. Also, I should have a box of the 6.5mm ABLRs showing up soon. The 260 won't push them very fast but there likely will be a thing or two to learn.

 

[royinidaho]

Y me Lord? What have I ever done? To deserve this.

Note: Pics are not in the order I mention below. Sorry, It's out of my control...

I'm beginning to feel like engineer101.

I ran up to IF and purchased that box of 270 ABLRs due to the excitement of the small group I got yesterday.

I spent the morning before going to town to set up the terminal test fixture. I filled it with some super hootie Canadian peat moss then saturated that with about 5 gallons of water. Nothing has come close to making it through the 24" length except for one 338 Hat Alum tip bullet which tumbled and bent but didn't mushroom.

The first pic shows the fixture. Its a better than half inch thick piece of 12" irrigation main line. Its pretty tough stuff. It's all beat to squat however due to 338 RUM and 300 Berger OTMs. I then hinged the bottm and hold it together with bungies to give it some flex. The front is a piece of belting simulating a thick skinned killer beast.

The bad news is, I had one hell of a time hitting a 12" diameter target @ 300 yds. Whats with that? From 7/8" to FEET over night!

I'm a pretty confused fella.

First shot should have been spot on zero. Well it wasn't even close. It hit way high and missed the media.

The next shot hit low and left, entered the media then came up and out after about 12" of travel. It entered the backstop which is filled with sand and river rock. Thus no bullet to look at.

The next shot hit about 3/4th of the way up the media. Not what I would call a full tilt test. The media was a bit light to my liking.

Penetration was 20" which is 2" better than most other bullets I've tested which include 140 NAB, 150 BTs, 225 - 338 NABs, 169 nS 197 WCS most of which make about 18".

This bullet traveled straight with the metal detector finding it straight away. (I have an English neighbor and its rubbing off)

What I retrieved reminded me of some 22LRs I've retrieved. My first impression was "dainty!" Weighed a grand total of 49.4 grains.

I then completely filled the fixture to the top and resoaked the stuff. I run these tests at pretty close to water holding capacity of the finely ground peat moss. The first shot wasn't quite up to that criteria.

The second pic shows when I finally got a center mass hit with the media sufficiently saturated with water. This is pretty much typical when I haven't adequately secured the fixture which is pretty much typical for me. . .

I set the fixture back on the saw horses and searched until I was completely out of patience and never did find any metal. After the results of the next shot, I can only think that the bullet came completely undone.

If it turns up later I'll let cha know but I did a CSI quality investigation and came up with zilch. . .

I fired a couple more shots and completely missed the whole thing. Found only one of the POIs which was about a foot high and that much to the left. I was about pulling my hair out about now!

Blasted again and hit high about 2" below the top of the media which greatly reduces stress on the bullet. Not much media wasn't much disturbed. This bullet traveled the full 24" of the fixture lodging in the plywood back.

The 5th pic shows the disturbed media. Not much resistance there.

The 6th pic shows the bullet lodged in the plywood.

This one was dainty too. 52.6 grains.

Shooter says these bullets are hitting a bit over 3100 FPS @ 300.

Summary of 3 hits out of 8 shots:

I think I have a loose rear base. I shot my goto load of 150 Bergers 3500 and came up with a uniform triangle 1.5 MOA group. In fact I shot a second group which was also symmetrical and 1.5 MOA. I thought I had changed that rear mount to a dove tail and was surprised to see that I didn't get around to it. Some times I wonder about me.

It will take some more shooting but at this point things suggest that at close range, high velocity and a solid hit what ya get is shrapnel and get it pretty quick.

And if ya hit something soft, what ever that is, penetration will be at least 20". I don't have any idea of when the shrapnel happens the metal detector found only one small fragment from the 3 hits.

As things are at this point the 150 Ballistic Tip out performs the ABLR in all categories mostly because ya can hit whatcher shootin' at. And they retain a bunch more mass.

I'll refit the scope base and ring and see if that is really a problem or if I've just gone funky.

It would be really interesting to see how far ya gotta shoot to get some weight retention.

 

[bigngreen]

Huh, this sure has been odd! I wonder if between the very aggressive boat tail and the thickness of the copper in it has displaced to much lead weight forward making for some wobbling but going straight forward projectiles.

 

[royinidaho]

Here's a pic of the back side of the retrieved bullets.

 

[MontanaRifleman]

Well, not surprising that they don't retain much mass when advertized to expand @ 1300 fps.

Form what I'm seeing, it looks like these bullets are best suited for stretching the range of moderate chamberings like 308. 30-06, 270 win, 280 Rem/284 Win, etc., with low velocity expansion. These bullets could make a 270 Win a solid 1K deer hunter..... if they shoot accurately at lower MV's that is

Don't fret Roy, those 270 EOL's will be out soon... they really will

 

[Pdvdh]

Roy, I was going to ask if you could repeat what you posted again? Say WHAT??? But I think I'll wait and let your testing play out further.

 

[tyler.woodard04]

wonder how these would do in a SP? I would be running them slower from the get go. might have to grab a box of 7mm 150s to try

 

[barnesuser28]

Hmmm, if the 175s 7mm perform like the 150 270s then i may have to get a box to try, i like what i am seeing with expansion, i wouldnt push them faster than about 2750 fps from my 284 win. Would make the perfect bullet for when deer and elk are on the hit list and shots could range from 50-600 yards.

 

[elkaholic]

Roy...it looks like your test verifies what I found except I had no trouble hitting the box at 10' The bullet I couldn't find that was fired at 2900 plus, I figured would weigh around 50 grains (had I found it) based on the others. It is starting to look like inconsistency from one lot of bullets to another to me. I suspect the balance may be on the ragged edge on all of them, but don't know? There is no question that they are a fragile bullet at close range. I was shocked to get the kind of expansion at 1354' that I did! Seems like they need to make something in between the old and new AB..........Rich

 

[royinidaho]

Re: Nosler Accubond Long Range problem2

Have a little time to think. Probably a bad thing for me.

Sitting in the hospital room with wiffie who is about to get tubed from the top. EGDs are great to wake up from.

The bullet that stuck in the backboard was unimpressive. For the small amount of media disturbance it I would have expected full penetration of 1/2" of weathered plywood.

Another experiment I'll do is place the belting a foot or so in front of the backstop to see how much splatter happens.

I have 2 270 Winnys to play with one that shoots way good and a Model 7 that is brand new.

On the loss of accuracy issue w/the Bergers, I had a brain fart.

When I fired them I noted excessive pressure. A little research shows I was 4 grains above what it should have been even tho I have a target hat shows 84 gr 7828ssc and a 0.3xx MOA group. The problem is that if enough 3-shot groups one is going to be a good one. Guess what, the natural man saves that one. Which is not a true indication of anything. That must be why Kirby called for more shots per group.

I'll redo that check.

The tube is going down her nose! The computer screen looks like a fish finder and a rocky bottom. TMi ya say?

See ya later

 

[MontanaRifleman]

Roy...it looks like your test verifies what I found except I had no trouble hitting the box at 10' The bullet I couldn't find that was fired at 2900 plus, I figured would weigh around 50 grains (had I found it) based on the others. It is starting to look like inconsistency from one lot of bullets to another to me. I suspect the balance may be on the ragged edge on all of them, but don't know? There is no question that they are a fragile bullet at close range. I was shocked to get the kind of expansion at 1354' that I did! Seems like they need to make something in between the old and new AB..........Rich

What they need to do is make these bullets in a partition design and get rid of the tip. These bullets are nothing more than Amax's and probably less sturdy and consistent.

 

[elkaholic]

What they need to do is make these bullets in a partition design and get rid of the tip. These bullets are nothing more than Amax's and probably less sturdy and consistent.

I would agre with the partition design, but I would LEAVE the tip and get rid of the hollow point underneath it. This is why they are so explosive! I've made partitions like this with my bullets and they work great. If you get rid of the tip, you basically have a Berger with a partition. Not a bad idea but no expansion at 1300' either.......Rich