Request for Recipe (.223 77gr HPBT), also info to share

[FMJBT]

Originally Posted by ar15barrels

All the more reason to shoot a bolt gun...
You get to control chamber dwell time by not loading rhe chamber and closing the bolt until a few seconds before you are ready to fire.
Those damn magazine-fed autoloaders make the assumption that you are firing quickly as they put a new round in the chamber right after you fire each round!

I know! Right? I try to get in a sandwhich, or a few levels of Angry Birds/ Plants vs Zombies between each shot and that automatic death machine just feeds the next round into battery without even asking. Totally ruins my zen.

I actually try to run through the mag pretty quickly most of the time. As soon as the scope settles back on target I'm putting pressure on the trigger for the next shot. Figure about 2 to 3 seconds between shots. Had one of my bipod legs cave in some small animals burrow last time I was out there. Suddenly my point of aim shifted about 40 mils low. That tends to throw off a a good rhythm between shots

[Conehead]

I borrowed a friend's chrono and was able to gather some data on my CFE223 loads...

Barrel: 18" Rainier Arms Match .223 Wylde
Bullet: Powder Valley 77gr HPBT (Blemished seconds)
Primer: Remington 7 1/2
Brass: LC, PMC, Hornady trimmed to 1.748"
COAL: 2.26"

Weather: 40 deg F, light hail
Elevation: approx 2800 ft
Chronograph: Shooting Chrony Delta

CFE 23.9
2537
2670
2579
2616
2581
2617
2579
2580
2559
2622


AVG (fps) 2594
MAX 2670
MIN 2537
ES 133
SD 38
===================================
CFE 24.3
2607
2620
2594
2642
2574
2648
2546
2605
2549
2574

AVG (fps) 2596
MAX 2648
MIN 2546
ES 102
SD 35

[ronas]

I might have missed it but I did not see any recommended loads using 2520.

I use 24.1 grs. and all I can say is it has excellent accuracy when shot from 16" barrel OBR and 20" barreled Stealth. Both have wylde chamber and I use nato spec. 556 brass.

Just surprised not one mentioned this load or something close to it.

[NiMiK]

I really need a chrono after reading through this thread! I ran some function tests on 10 rounds yesterday and had some horrible groups at 100 yards. 5 rounds of 77gr SMK w/c, no crimp. 5 rounds of 77 gr Nosler CC. Both using same LC '12 brass and 23.5gr of varget. Seated close to mag length with ogive of 1.888.

Either my barrel doesn't like these pills or I screwed up somewhere. Wont know till I get a chrono.

[tye93]

I have 1/8 twist carbine m&p15t 16 inch barrel witch gr and ammunition would be at its best for acurracy it is chambered in 5.56 nato

[AeroEngi]

Originally Posted by NiMiK

I really need a chrono after reading through this thread! I ran some function tests on 10 rounds yesterday and had some horrible groups at 100 yards. 5 rounds of 77gr SMK w/c, no crimp. 5 rounds of 77 gr Nosler CC. Both using same LC '12 brass and 23.5gr of varget. Seated close to mag length with ogive of 1.888.

Either my barrel doesn't like these pills or I screwed up somewhere. Wont know till I get a chrono.

Try running an OCW test with your loads.

[Hoop]

Originally Posted by NiMiK

I really need a chrono after reading through this thread! I ran some function tests on 10 rounds yesterday and had some horrible groups at 100 yards. 5 rounds of 77gr SMK w/c, no crimp. 5 rounds of 77 gr Nosler CC. Both using same LC '12 brass and 23.5gr of varget. Seated close to mag length with ogive of 1.888.

Either my barrel doesn't like these pills or I screwed up somewhere. Wont know till I get a chrono.

24 grains and 2.245" length should be near MOA. That's about the best I've gotten with those bullets. Hornadys and Sierras both grouped better for me.

[CK_32]

No one here uses H335 for powder?

[ar15barrels]

Originally Posted by CK_32

No one here uses H335 for powder?

It's too fast to do really well with 77gr bullets.

[CK_32]

Good to know. It did well with my 55gr stuff. I was going to start load development for my 1:7 16"ers and 10"ers with it but glad I asked first.

Probably try my IMR/Varget like everyone else.

[ar15barrels]

Originally Posted by CK_32

Good to know. It did well with my 55gr stuff.

h335 is perfect for 55gr bullets.

[NiMiK]

Here's my 3 shot group with 77gr Nosler CC. 4th shot not included was due to the wind gust that moved the target. Guess I had to "season" the barrel.

18" BCM SS410 barrel
Nosler 77gr CC
23.5 grains of Varget
'14 LC brass
CCI 41 primers
Seat depth to 1.887 ogive
ImageUploadedByTapatalk1426297313.201211.jpg

[triggs75]

? on load, are these too hot of a load

Working on 223 load and wanting to see what my rifles like the best.

2 barrels
18" criterion 1/7 twist
20" JP 1/8 twist

Bullet: 77 gr Sierra MatchKing HPBT
Primer: CCI 400
Brass: LC
Brass Trim: 1.750
OAL: 2.256 - 2.258
Ogive: 1.875

Powder: Hodgdon Varget

Loads I am looking at are the following:

22.5, 23, 23.5, 24, 24.3, 24.5 & 25

THe Lyman reloading book is the only manual that states you can go up to 25 gr of Varget.

Is going above 24 gr of varget too hot of a load with the above information?

Thanks for the help,

Chad

[AeroEngi]

Originally Posted by triggs75

? on load, are these too hot of a load

Working on 223 load and wanting to see what my rifles like the best.

2 barrels
18" criterion 1/7 twist
20" JP 1/8 twist

Bullet: 77 gr Sierra MatchKing HPBT
Primer: CCI 400
Brass: LC
Brass Trim: 1.750
OAL: 2.256 - 2.258
Ogive: 1.875

Powder: Hodgdon Varget

Loads I am looking at are the following:

22.5, 23, 23.5, 24, 24.3, 24.5 & 25

THe Lyman reloading book is the only manual that states you can go up to 25 gr of Varget.

Is going above 24 gr of varget too hot of a load with the above information?

Thanks for the help,

Chad

I've gone up to 24.6 gr of Varget behind a 77 gr Nosler CC projectile with no pressure signs whatsoever using LC brass. I'm planning on going up to 24.8 gr next in search of that perfect load. Rifle was my SPRish build with 18" WOA SPR barrel with 223 Wylde chamber. However, YMMV. Always work up your loads in YOUR rifle and don't just blindly use someone else's load.

[highpower790]

24.5gr of varget will be all you ever need with bullets up to 80gr in weight.

[mannyp]

Originally Posted by AeroEngi

I've gone up to 24.6 gr of Varget behind a 77 gr Nosler CC projectile with no pressure signs whatsoever using LC brass. I'm planning on going up to 24.8 gr next in search of that perfect load. Rifle was my SPRish build with 18" WOA SPR barrel with 223 Wylde chamber. However, YMMV. Always work up your loads in YOUR rifle and don't just blindly use someone else's load.

I've done load development with the same components a few weeks back from 22-24.7 @.3 grain increments. A bit of primer cratering starts at 24.4 and very obvious at 24.7.

I am using a noveske 16 barrel. I settled for 24 grains.



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[CK_32]

Anyone have any load data for 1:7 16" shelf guns?

I need to work up a load for 600-800 yards with IMR4895/Varget. Anyone have any pet loads I can work up to for this?

[jimmykan]

Originally Posted by CK_32

Anyone have any load data for 1:7 16" shelf guns?

I need to work up a load for 600-800 yards with IMR4895/Varget. Anyone have any pet loads I can work up to for this?

Somewhere between 24.0 and 24.5 grains of Varget.

800 yards is asking a lot from a 77 grain bullet out of a 16" barrel though.

[CK_32]

Ok I was expecting 24-24.5 ish range. I'll do a work up and see how pressures are around 24.

And I know, it's not a serious competition 10 ring load. We just want to get the best we can for our limited set up. I have 308s build for 1000, I just want to mess around with 5.56 and not just lob XM 55gr out there with a prayer.

Get a slightly better more stable bullet/load. Won't be great but I'm sure it will be worlds better than the 55gr plink loads we have. Also so my girl can see what it takes to shoot long distance. See if it's her thing.

[boyguan]

Any suggestions for 77grn tmk?

I’m trying varget from 22-25 grn and can only get a decent group at the low range. Anything higher and I’m getting compression and start to deform the bullet

[jimmykan]

Originally Posted by boyguan

Any suggestions for 77grn tmk?

I’m trying varget from 22-25 grn and can only get a decent group at the low range. Anything higher and I’m getting compression and start to deform the bullet

Try some Hodgdon H4895, IMR 8208 XBR or a spherical powder like Ramshot TAC.