Can someone please explain

[Desert Fox]

I need help analyzing this. My friend just blown my methods of meticulous handloading out of the water. Anyway, a few months ago, we decided to try the Nosler 168 Competition on both of our 308, and see if we can use the bullet for hunting. Well to make a story short, my rifle likes the Nosler and not on his. He handed me the rest of his already handloaded ammo, around 100 rounds in all, and give up on Nosler all together. I tried several of his reloaded rounds in my rifle and it chambered okay, even though he was using brass that was once once fired from his rifle. Except with occassional trimming, which is as far as his case preparation goes, he rarely does anything else on his brass. The other day, I tried his handloads on my rifle and the result was short of amazing.

Here's the spec of his handloaded 308 ammo

168 grain Nosler comp
43 grains of H4895
Federal 210 Match Primer
Winchester Brass/once fired and partially necksized/trimmed with no other case prep
COL 2.825 AV. jammbed slightly to the land

Here's the the Chronograph reading

High: 2749.1 fps
Low: 2745.4 fps

SD: 1.4
CV: 0.05%

MAD: 1.1
CV: 0.04%

AV: 2747.3 fps
ES: 3.7

#001: 2747.3 fps
#002: 2749.1 fps
#003: 2745.4 fps
#004: 2746.3 fps
#005: 2746.2 fps

Group: Not shooting for groups but Cloverleaf around half inch.

Now, What happened here?

 

[kraky]

You kind of proved what I've believed for a long time. That is that 98% of a guns accuracy comes from how much it likes the combination of powder, bullet, and seating depth. I think the fact that you jammed the lands a bit might have made the pressure more consistant. It also probably negated any trouble from runnout issues (which I also think are over blown).
In last months issue of Shooting Times they test the new factory savage long range 308 designed for F class shooting.
They tried lots of factory ammo and some handloads. They found 7 LOADS THAT SHOT UNDER 2" AT 500 YDS!. There was no attention paid to loading technique other than making sure they were the same seating depth.
In the same issue they experiemented with neck turning. The result was there seemed to be no consistant diff between turning necks and and not turning. The amazing thing is the VERY BEST group they got was with a mix of different headstamps at the end of the test trying to shoot off the last bullets they had.
I don't think there really is anything to explain here.....your buddy found YOUR MAGIC LOAD for your rifle.

 

[royinidaho]

Don't look a gift horse in the mouth.....
Praise the Lord and pass the ammunition.....
Clean livin' pulls through again......

Don't shoot'em all at paper amazing yourself....

Go harvest something.......

Bet it doesn't happen again.......for a while.

Good shootin' and have fun

Oh yeah? Why doesn't that ever happen to me. /ubbthreads/images/graemlins/frown.gif

 

[Stormrider]

If I was you, I'd try to duplicate that load and see if it shot the same.

 

[Mikecr]

What chronograph are you using?

 

[Desert Fox]

[ QUOTE ]
Don't shoot'em all at paper amazing yourself....


[/ QUOTE ]

I have around 75 rounds left. I'm saving them for a special hunt of course /ubbthreads/images/graemlins/wink.gif.

[ QUOTE ]
If I was you, I'd try to duplicate that load and see if it shot the same.


[/ QUOTE ]

Loads was already analyzed, scrutinized, measured and studied for future duplication.

[ QUOTE ]
What chronograph are you using?


[/ QUOTE ]

I'm using Pact Professional Chronograph setted 10 ft. from the muzzle.

 

[Bob Wright]

Wow, that shot great. Go load some up with the same and see if it repeats for you. That's the ultimate test. By your friend a steak dinner!

 

[Baker Alvin]

I agree with Kraky and Bob Wright. I checked case length, finished OAL and used mixed brass for years.

 

[Ol' Red]

I have to ask. Did the bolt close hard? Was the OAL longer or shorter than what you had loaded for your rifle? Did he use the same powder that you had used? And maybe the most important, did he give you any stock market tips or lottery numbers to try? Most certainly duplicate that load and test it again.

 

[FEENIX]

After nearly 15Y later ...

 

[milboltnut]

I think resurrecting these old threads means guy sitting behind the computer too much.

 

[Ol' Red]

It's been 15 years? That explains this long beard! Forget the stock market tips.

 

[milboltnut]

It's been 15 years? That explains this long beard! Forget the stock market tips.

have you bathed since then ?

 

[waveslayer]

Pretty funny how old threads are found, but are very relevant to today. Most guys think they can take an inaccurate gun and make it a world class shooter by reloading for it. That's just not the case.

Garbage in Garbage out. Inaccurate rifle inaccurate results.

Recently there has been some amazing discussions from a few experts. Their topics would offend most reloaders because it is what we have been told and taught, for example: Ladder Test- not an ideal way to test, Neck tension- not super important, primer seating depth- waste of time, SD & ES- doesn't mean anything unless you are shooting at a specific distance (transonic range), powder charge weights- not as important as you think, the list goes on and on.

Basically if the system is accurate and made with superior materials it will plainly just shoot and shoot well. No matter what you feed it, it will print little bug holes. Makes you wonder and question a lot, but all the testing that litz, Frank (Bartlein) and a few others are going to make some interesting discoveries.

Basically without getting into all of it, but with the ability to test certain factors and duplicate them, that's now changing what we have always been told....