Xtreme - Load data

[Tim_W]

I thought this would be a very good idea for all Xtreme users to help each other out. What I would like for anyone that is willing: Enter any and all load data you collect from your Xtreme uppers. I think this will be very helpful to all oif us. This way especially as hutning season wil be here in a few months for us all to pool our research on various loads. It will help hsooters of facvotry and hand loads alike. Here is why: Some my hand load but not have chronogrpahs so they have no idea what there velocites are but have very accurate loads or have done a lot of loading. Other may not hand load but do have chronos and sjppt many factory loads. Others may hand load and have all the belss and whistles and just not the time to go huntjing for accurate load. As you can see if every one contributes what they have collected we can pool some very good info we call all work off of. What is special here is that becasue of the perfomance effects the bore specifications have and the fact the throat on the chamber aligns the bullet to center-line better most of this data will only really be of technical use to Xtreme users.

Please no matter how basic your data may be please post it as you never know whom it may help as how others may help you. As we start to get a good amount of data in I will start to compile it into a chart so people can reference it quickly and with ease.

I think for the easy of reading the data and finding it we try to keep it in a standard format. It does not matter if you have data for all the field jsut fill in the data you do have. I also would like any factory. rounds data as well. EVen if you do nto reload or have a chrono you can still contribute. If you shoot at differnet distances, post the amount of comeups/drop you needed for the distances. This wil tgive people getting ready to hunt or shoot a good idea of what they need to hold it they sue the same ammo.


Here is the format I think woudl work best. If some has a suggestion of soothing they thinks would work better I am all ears or eye in this case.

* Hand Load or Factory (If factory list manf and if SSA tactical or commercial)

* Bullet: Manf, Weight, Type

* Powder: Name and charge weight

* Primer: Brand and Version

* Case: Brand, Trim length, (becasue of SSA making both primer sizes and for those new that may not know primers sizes list this as well)

* COAL: Length from tip to base.

* Crimp: if one is used or not and the amount ( if with the LEE FCD list the amount in turns)

* Upper just Xtreme is fine ( if its something else we need barrel length, make, chamber, twist,and rifling.)

* Chronograph results: Vel per shot, average, ES, SD

* Air Temperature

* Group Size and pictures of targets would be awesome.

* Comments







Example:

Hand Load

Speer 90 gr TNT

Reloader 7 29.3 gr

Wolf 556

SSA small primer 1.676" OAL

2.295"

No crimp

Chrono: 3000, 3015, 2999, 3007, 3911; av 3006; ES 16; SD 7

Group Size: 0.62" @ 100 yards

Temp 86 degrees

Comment: One of the best target loads, not too hot, no pressure signs.

[David]

EDIT: all of the velocities listed are probably incorrect. The old Chrony I used was no longer trustworthy and a new chronograph yields much higher velocities for loads listed here.
Handload
110 gr Sierra Prohunter SP
H335 31.0 gr
Wolf 223 primer
SSA small primer once-fired case ~1.670
OAL 2.285"
No crimp
Xtreme upper (Similar to ARP's product)
Chrono 2512, 2514, 2486, 2509
80 deg F
No swipes, ~1.5" groups
-----------------------------------------------
Handload
110 gr Sierra Prohunter SP
H335 31.5 gr
Wolf 223 primer
SSA small primer once-fired case ~1.670
OAL 2.285"
No crimp
Xtreme upper
Chrono 2553, 2546, 2570 one case with slight swipe.
80 deg F
same load, new SSA cases
Chrono 2587, 2597
still about 1.5" "group", very slight swipes on both cases.
-------------------------------------------
Handload
110 gr Sierra Prohunter SP
H332 30.0 gr
Wolf 223 primer
SSA small primer new cases
OAL 2.285"
No crimp
Xtreme upper
Chrono 2551, 2535, 2556
80 deg F
Shoots 2" right of point of aim (point of aim set with H335 loads above)
No pressure signs
---------------------------------------
Handload
115 gr Remington FMJ
28.2 gr H322
Remington 9 1/2 Large rifle primers
Remington once-fired LR cases ~1.670"
OAL 2.280"
No Crimp (ignored the cannelure)
Xtreme upper
Chrono 2472, 2490, 2495, 2481, 2467
80 deg F
Shoots 1" left of point of aim (POA set with H335 loads above) Very accurate, 4 of 5 shots in <1"
One case with possibly a slight swipe.
-----------------------------------
Handload
115 gr Remington FMJ
28.4 gr H322
Remington 9 1/2 primers
Remington once-fired cases ~1.670"
OAL shorter to...
Heavy crimp into cannelure.
Xtreme upper
Chrono 2430, 2434
80 deg F
Shoots 2" left of point of aim (POA set with H335 loads above). Accuracy not recorded.

[David]

Tim, all of the loads I listed (except the last one) were after sizing the cases just enough to fit into the chamber. Now having the LNL headspace gauge, I determined that I was bumping the shoulder back about 0.004" just as was the plan.

The LNL gauge reads 3.360" on fired cases, and I now set the Hornady sizer die to produce 3.356" on the gauge (you weren't kidding about how small a rotation on the sizer is needed to change headspace in 0.001" increments).

This does generate a mild question. There are posts all over the forum for Xtremes producing 2700 fps with 110 gr bullets. It appears to me that my Xtreme max's out at less than 2600 fps. Did I happen to get one that is just a little less tolerant of higher end loads? Or do you think this is this just an oddity that arises from the particular dies, lot number of propellant, cases, etc. I happen to be using?

This is NOT a problem, because I look at the ballistics tables and laugh at the very notion that I could hit a target at 305 yds (the theoretical "limit" of a Prohunter's expansion when it starts at 2550 fps), much less another 15 to 25 yds if I got the extra 150 fps. I just ask to see if this is just upper-to-upper variation that is to be expected when it comes to these things.

I guess I just don't know to what degree we should expect variation from upper to upper (or barrel to barrel in any caliber, for that matter).

As an aside, the best group I shot was with the Remington cases and "cheap" bulk Remington FMJ bullets. What were the odds of that?!

[David]

Hornady 110 VMAX FACTORY LOAD
Xtreme upper
Chrono 2498, 2495, 2517, 2514, 2506, 2520 [edit: I no longer trust the Chrony that yielded these. The velocities may be bogus.]
80 deg F
Accuracy not recorded, but probably 2-3" with somewhat unsteady benchrest.
---------------------------------------
Hornady 100 VMAX FACTORY LOAD
Model1Sales 20" SAAMI chamber 6 groove 1 in 9.5" twist
Chrono 2564 (only one round fired, got a one-hole group!)
80 deg F
No pressure signs noted
---------------------------------------
Handload
110 gr Hornady VMAX
H322 29.5 gr
Remington 9 1/2 primer
Remington case once fired ~1.670"
OAL 2.280"
Heavy Crimp (no cannelure, however).
Xtreme upper
Chrono 2479, 2487, 2504
80 deg F
Accuracy not recorded. No pressure signs revealed.
----------------------------------------
Handload
110 gr Sierra Prohunter SP
H335 30.5 gr
Wolf 223 primer
Hornady once-fired cases ~1.680"
OAL 2.285"
No crimp
Xtreme upper
Chrono 2564, 2517, 2565, 2498 [Edit: see note above about Chrony]
Accuracy not recorned; no pressure signs
----------------------------------------
Handload
110 gr Sierra Prohunter SP
H335 30.5 gr
Wolf 223 primer
SSA once-fired cases ~1.670"
OAL 2.285"
No crimp
Xtreme upper
Chrono 2475, 2475, 2490
Accuracy not recorded; no pressure signs
---------------------------------------
Handload
110 gr Sierra Prohunter SP
H335 31.0 gr
Wolf 223 primer
Hornady once-fired cases ~1.680"
OAL 2.285"
No crimp
Xtreme upper
Chrono 2600, 2609, 2530, 2564 swipes present; one case head slightly deformed by extraction. Same load in SSA cases revealed lower vel., no swipes, confirming that Hornady case capacity is smaller than SSA.
Accuracy not recorded.

[creeper2]

115 SMK H322 started at 27.5 and worked my way up to 28.1 with no signs of pressure . Found that it likes the hotter loads.I will bump up a few tenths on my next session. I have no chrono , so I dont know thw muzzle velocity.

115 grn SMK
H322 28 grns
Wolf 556
SSA brass trimmed to 1.674
COL 2.275
Lee factory crimp to Lee specs
XTreme upper
No Chrono
73*
group size .456 center to center



115 grn SMK
H322 28.1 grns
Wolf 556
SSA brass trimmed to 1.674
COL 2.275
Lee Factory
XTreme upper
no chrono
73*
group size .550 center to center

[SavoyLLC]

Hello fellow 6.8 spc shooters. I'm looking for a fast load for Barnes new 85gr. TAC-X. I have both the Harnady (small primer) and R-P/SS (large primer) brass. Any help will be appreciated.
Thx,
-J

[Cavitation]

What is an XTreme upper?

[68WJ]

What is an XTreme upper?

Manufacturer that isn't manufacturing anymore.

[Plannerdude]

Ah, the XTreme upper. The XTreme was ARP's (Constructor) and Titan Armory's (TimW) first 6.8 upper produdced back in early 2009. Their goal was to make an affordable high quality 6.8 upper.
Here is the original description: "Barrel 16" 4150 Chrome Moly, Chrome Lined, M4 Extension, DMR-C chamber*11.25 twist 5R Rifling, Mid-Length Gas Port, Recon light weight*profile, CMT 6.8 Bolt Extractor and Ejector Springs upgraded with 9002 chrome silicon, heat treated, shot peened, stress relieved springs.* 80% extra power. Squaring and Lapping of critical areas to ensure maximum accuracy, consistency and reliability" All for $599.00 plus shipping. I have one of very first XTreme uppers that ARP produced and it still shoots very well today. Still able to get groups from just under 1/2" to about 3/4" with 120 grain SST's, 90 grain TNT's, 95 grain TTSX's,, 110 HPBT, the 110 grain V-Max not so much.