Range report - 223 with 75 A-Max

[squirrelsnpr]

Went to the range today to try out a load I have been working on for my .223 untouched Savage action with a Shilen 1-9 twist barrel shooting a 75 A-Max with H322. I had resonable success at 100 yards, but it didn't set the world on fire, but always consistant. I shot is at 100 yards and again, decent.

I then went to the 200 yard line to see the results. I guessed at the adjusted elevation and was close. After I got through 4, I couldn't believe the grouping. Of course I pulled the fifth.

I continued to shot figuring this first group was a fluke. One more click for elevation and windage. After the second 5 shot group I thought I might be on to something.

So I shot the third 5 shot group just to confirm. I made one more click for elevation and windage. I could not believe it.

Now lets see if I can duplicate this next week. Then I'd really have something. This might have been just wasnt one of those days where the shooting gods smilled on me. I even thought the .17 HMR even shot well at 200 yards.

Here's to shooting,

Mitch

 

[olympian]

I would recommend you try some Varget, Reloder 15, or AA2520 if you want to seek a more accurate load. Just a suggestion once you get 100 rounds or so through it.

 

[nirish]

I shoot a 223/1-9 twist-75g a-max vv140 power out to 600yds it take out the v/bull in f/class target.

 

[1000yardstare]

Shot F Class out to 600 yards last Summer with a 30 inch 8 twist .223 barrel. Tried 69 MKing, 75 AMax, 80 MKing, 80 AMax with different powders and CCI 450 primers. Settled on H4895 and 75 AMax as the load to take to the 2009 Canadian Fullbore Champs. Chronos at 2900 fps. Shot the 300 metre Sierra ISU preliminary match with the 75 AMax, 60 shots plus sighters per day for 2 days. Didn`t win but was satisfied with the result for a first time effort.

Have resisited moly bullets up to now. Ordered some 75 AMax moly and tried them yesterday with the same load of H4895. At 300 metres (330 yards) off a bench, shot a 10 shot group measuring 2 3/4 inch scoring 100-4x on the International F Class target. Will try the molys next summer in F Class.

 

[Taildrag15X]

Won the Vermont State 600 yard F/TR Championship this past May with 75gr. A-MAX'S and Varget.

 

[ForneyRider]

Pretty slick for 1:9.

I can do .6in @ 100 yards with 69gr SMK and 75gr Hornady BTHP. But I thought the 75gr A-Max would be too much for 1:9in stock DPMS barrel.

I have some 73gr Berger to try as well.

I use AA2230, R15 and Varget. AA2230 has been the best, but I've read I can go down to 22.5gr with Varget and R15 in the 69-75gr bullets in .223. I get 2900-3000fps with max charge of AA2230 and good accuracy, but with R15 and Varget, the better loads with min charges.

What OAL are you using? What chamber is the Shilen? Wylde?

 

[squirrelsnpr]

Im am using a bolt gun with a standard .223 reamer and loading them to 2.950" with the hornady comparator.

 

[boltman13]

Outstanding groups, it ain't broke so don't fix it. My 1:9 AR-15 win't stabalize the 75 A-max, but my 22" barreled 1:7 AR-15 match rifle loves them. Varget-24.5 grains, WW case Rem 7 1/2 primer. Best of luck.

 

[Taildrag15X]

Im am using a bolt gun with a standard .223 reamer and loading them to 2.950" with the hornady comparator.

So...I hope that is a typo on your OAL......I know the Savages are throated, but come on 2.950", what keeps the bullet in the neck......or do you have a muzzle loader.

I'm at 2.5450" with the 75 A-Max.

 

[boltman13]

The Hornady comparator, the old Stoney Point one measures the distance from the base of the case to the ogive of the bullet and when the atachment is placed on the dial calapers it takes up about 1 inch of travel. I reset the dial to exactly 1" and make my measurment. My 75 gr A-max load for my long range shooting in my AR-15's measures 2.900. I am jumping about 0.02" to the rifling. I have plenty of bullet in the case neck.

 

[Taildrag15X]

The Hornady comparator, the old Stoney Point one measures the distance from the base of the case to the ogive of the bullet and when the atachment is placed on the dial calapers it takes up about 1 inch of travel. I reset the dial to exactly 1" and make my measurment. My 75 gr A-max load for my long range shooting in my AR-15's measures 2.900. I am jumping about 0.02" to the rifling. I have plenty of bullet in the case neck.

I have used a Hornady/Stoney Point, Sinclair and even the RCBS Case Mic set for measuring bullet seating depth. I also know that it is impossible to have an OAL for a standard .223 Rem. case with a 75 gr. A-Max bullet set at 2.900 and I will quote again "My 75 gr A-max load for my long range shooting in my AR-15's measures 2.900. I am jumping about 0.02" to the rifling. I have plenty of bullet in the case neck."
I just had to quote it again......due in fact that you are starting with a case that is 1.760" long and then add a 75 gr. A-Max that is
1.095" long.....that makes the combined length of case and bullet
2.855"....that leaves a GAP OF .005" between the bullet and the case.....and your chamber is even longer than that.......

SO NO BULLET AT ALL IN THE CASE, THE LISTED LENGTH IS TOO LONG.


SO AGAIN, I THINK THERE'S A TYPO IN THE LISTED MEASUREMENT.

 

[LWolken]

Zero your calipers attach the stoney oal jig 2-22 insert and measure. The measurement is correct considering that my 50 gr. Vmax loads measure 2.885"

 

[Taildrag15X]

By using the tool to measure OAL your adding the length of the tool to the measurement.......TRY IT WITHOUT THE TOOL....Measuring just the loaded round with the calipers.......THAT IS OAL.

I only use he TOOL to set OGIVE MEASUREMENT, not OAL as it's not the same adding the tool and it is a false measurement.

Refer here for OAL, ie the length of the Round nothing else: http://www.6mmbr.com/223Rem.html

I will post some pics of my loaded rounds vs. your 2.950" .223 Rem.

 

[dantiff2]

My 223 ogive measurement with the Sinclair nut and a 52 grain match king is 2.910 so the measurement he has is NOT a typo ! He is using a ogive measuring tool, You have to subtract the amount of bullet in the tool then add the length of the tool. i.e. My base to ogive (NOT TIP OF BULLET) is 1.910, add the length of my comparator ( 1 inch) and wallah ogive oal of 2.910......

Dan

 

[Johnboy]

hey just something to look at.I was able to get a 77g NCC to shoot a very good group the other day.you can see my target under 5R milspec with a 77g bullet.and I tell the load also.hey it worked for me so it might just work for you.and the rifel had only 100 down the tube.even getting the 75g berger vld to soot good with the same loadmentioned in my post.just thought that I'd share my results.and my post is under small stuff.

 

[LWolken]

What you are refering to would be known as C.O.L. Cartridge Overall Length. Like it is written in reloading manuals. OAL means overall length and does not specify what the length is or how it was obtained..... I explained how he got the measurement and the measurement is correct with a stoney tool.

Lance

 

[fdshuster]

I'm with taildrag15x on the overall length issue. Keep it simple, forget the Stoney Point, Sinclair "nut", etc. I just took one of my 75 A-max bullets, set it on the case mouth of a 1.760" case, and measured the overall length, case base to tip of bullet, and it is 2.664", and that's without any of the .224" dia. to hold it in the case neck, so the "for real" length would be even shorter. Then took a 50 v-max, set it on the case mouth (same 1.760" oal case) and that measurement is 2.465", shorter if seated deep enough to hold in the case.

 

[dantiff2]

I'm wondering if the concept of ogive measuring is to much for your minds to grasp. If so, you should stick with off the shelf factory ammo. As I do not want to be next to you at the range when you shoot your handloads. ;D

Dan

 

[fdshuster]

dantiff2: Without doing or changing anything, take an ordinary ruler, you know 1/16", 1/8", 1/4", etc. lay the ruler alongside the loaded round that you show in the picture and measure from the case head to the flat on the Sinclair nut ( "22" shown), and the measurement will be less than what your dial caliper shows. I cannot understand why the dimension of the "nut" is included: it is not the "length-to-ogive". To get the length to ogive with the Sincalir "nut" you must subtract 1" from the dimension shown on your dial caliper. Been loading match ammo since 1960.

 

[dantiff2]

You are correct and so am I. We both stated that we got the measurement WITH an ogive measuring tool. As stated in my other post my measurement is 1.910 when I SUBTRACT the nut. But the man did say his measurement was WITH the tool, and he was told he was wrong. No one here is wrong.

Dan