Load development and testing in my AR15

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Load development and testing in my AR15

Postby TomKat » Sun Jul 01, 2012 2:49 pm

[size=12pt]# 1) 50 Gr NBT 25.8 Gr 8208XBR OCL 2.250 5 shot group
# 2) 50 Gr VMAX 25.8 Gr Benchmark OCL 2.250 The flyer was shooter error
# 3) 40 Gr NBT 25.5 Gr 8208XBR OCL 2.250 I think this one shows promise
# 4) 45 Gr Sierra Varminter 26.5 Gr 8208XBR OCL 2.210 Started the furthest from the barrel
# 5) 40 Gr NBT 26.5 Gr Benchmark OCL 2.235 4 shot group
# 6) 53 Gr Sierra MatchKing 24.5 Gr Benchmark OCL 2.250 2 shot group[/size]

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All shots were fired from a solid rest at 100 yards. Barrel was allowed to cool off between shots. Based on what I have seen with this gun, I believe that it prefers lighter weight bullets. I will test #3 and#4 According to the published data, group # 3 was traveling at over 3,400 FPS. This test load was 1.2 Grn under the max load.
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Re: Load development and testing in my AR15

Postby War Wagon » Sun Jul 01, 2012 7:24 pm

Did you ever try Moly coated bullets ?
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Re: Load development and testing in my AR15

Postby TomKat » Mon Jul 02, 2012 7:04 am

Yes I did. In fact, I have some moly coated .308 bullets I would make someone a deal/trade on.

I am probably not a Molly fan.
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Re: Load development and testing in my AR15

Postby Sagebrush » Thu Jul 05, 2012 11:25 pm

Never know what a gun will like.

I have a 22-250 that does not like any thing under a 52gr bullet, and it prefers the 55 grain in all base and tip styles.
Even groups well with a huge 70gr speer, of all things, with its 1-10 twist. win and cci primers for best accuracy in
my gun,funny how a primer can change a groups size, with sierra and the v-max bullets.

Glad to see that new 8208 is working out for you, I have yet to try that powder.
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Re: Load development and testing in my AR15

Postby TomKat » Fri Jul 06, 2012 6:31 am

I have a saying- "the gun will tell you what the proper load is".

Its very true, every rifle likes something different. I did a lot of homework on the carbine length barrel and KNEW that I would be shooting 55grn bullets...WRONG! This one likes lighter bullets, which works fine for me. I will be testing # 3 and # 4 tomorrow.

I have a feeling the 40 grn NBT will be the best load. That one runs over 3,500 fps!

I am going to start load testing for my .22-250 this month. Results to follow.
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Re: Load development and testing in my AR15

Postby TomKat » Thu Dec 06, 2012 7:42 am

No, feel free to make conversation commrade!
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Re: Load development and testing in my AR15

Postby waterfowlhunter » Mon Dec 17, 2012 12:09 pm

I have 2 of the RRA mid-length Rifles and they both like heavy bullets. I shoot a lot of Nosler Partitions in them and get sum MOA accuracy but it I drop to 40 or 45gr bullets I get flyers. they also shoot very well with 55gr nosler BT's with a stiff load of benchmark or Varget behind them.

The Hornady v-max never did quite give me the groups I was looking for but they shoot nice in my larger cals.
"A free people ought to be armed" George Washington 1790

‘For those who would give up essential liberty to purchase a little temporary safety, deserve neither Liberty nor safety.’ —Ben Franklin.”
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Re: Load development and testing in my AR15

Postby War Wagon » Sat Dec 22, 2012 4:16 pm

I just hope the Democrats dont make you turn in your black guns. :mad:
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Re: Load development and testing in my AR15

Postby waterfowlhunter » Wed Jan 02, 2013 7:27 am

War Wagon wrote:I just hope the Democrats dont make you turn in your black guns. :mad:


I have a response to this but did not want the feds knocking on my door later about my post. :yes: :yes: :yes:

Can not wait for spring, Just reveived some new Hornady 50gr GMX bullets to load up and test. LOVE my black guns....
"A free people ought to be armed" George Washington 1790

‘For those who would give up essential liberty to purchase a little temporary safety, deserve neither Liberty nor safety.’ —Ben Franklin.”
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