125 Nos partition load data

[P-P]

125 Partitions?

Well... Anyone get more data yet on the 125 grain Nosler Partition bullets yet? Especially with IMR 8208 XBR?

[hm2 clark]

I see that Crenshaw Ammo has 125gr Nosler Partations for sale @ $24 a box 2 Aug12

[Blacklab]

I wish!!!!! still waiting on the barrel 18 weeks & counting

[P-P]

Started out at 26.2 grains of 8208-XBR and worked up at 0.3 grain, then 0.2 grain increments. Got these this morning - they were the two highest loads I've tested yet in this series.

Rifle barrel = 20" Sabre Defence

Group 1:
Nosler 125 grain Partition bullet
27.3gr IMR 8208-XBR
2.200" COL
Hornady cases, WSR Primer
Average Velocity = 2491 fps
Extreme spread = 10 fps
Standard deviation = 4.4 fps

Group size at 100 yards = 5/8" high X 13/16" wide.

Group 2:
Nosler 125 grain Partition bullet
27.5gr IMR 8208-XBR
2.200" COL
Hornady cases, WSR Primer
Average Velocity = 2526 fps
Extreme spread = 11 fps
Standard deviation = 4.5 fps

Group size at 100 yards = 15/16 high X 1-1/16 wide.

No great pressure signs on the primers or brass. I will try hotter, but think I might stick with one of these. I'll make a bunch more of each and play with them.

[hm2 clark]

They kinda closed the range near my house this year. So my choices is spending an hour and a half driving each way to work up a load just using what I have and using you guys for data sources.

[bwaites]

I think that you are close to max with XBR at 27.5-28 grains. In playing with XBR, I'm find that it has a very sharp good/not good edge and when you get close you go from very nice to dangerous very quickly. 2500 FPS is nothing to sneeze at.

I think CFE 223 might actually be a better choice for the 123 and up bullets. I'm above 2600 FPS with 130 grain Bergers with normal looking brass and only VERY slight primer flattening. When I go over 2600 FPS with 123's with XBR I start to see some primer cratering and Grendel Belted cases.

[sneaky one]

PP, nice work on the 125's. How far from rifling contact are you seating them? I'm sure w/cfe-223 the speeds would go up somewhat. I'd like to see those in a 115-118
grn. wt.... maybe I'll pick up a box...hmmmmm

hm2-you're going to hate me for this one... The local skeet range is putting in a rifle range area-to 200yd. I'll be donating my H.D. tripod portable press holder-to load on site! Anyone can bring their own press ( drill holes to accept it) and a few ingreeds to assemble,- tweak loads as you shoot---it's only 1.5 miles from my house!!!!!!!!!!! I'll probably bring my tv, and recliner over too, and live there part time-hee-heeee! Sometimes what you wish for, actually happens! Think positive. Build your own business--gun range.

[sneaky one]

Bill, I agree on the max load idea on this-I tried to copy almost all my data from Tac-over to 8208 as a start point--26.2 was the start, I think 26.8-27.0 was a perfect stop point. I usually find the ceiling, then back it down .5-.6. Usually dials itself in around there. Plenty accurate enough for hunting too. Have not tried cfe w/ the heavies yet.

PP- maybe back it down a bit, try a diff. seating depth . How solid are you (welding) yourself to the bench?

[hm2 clark]

Any data yet with the CFE 223 and 125 gr Partiations?

[P-P]

Sorry - been too busy this month to even make it to the garage.

[Whelenon]

WARNING - Started to see pressure signs with 28g of 8208, primers flattening and slight ejector marks.

Finally got out to the range with some 125 Partitions. Still have work to do. Tried 5 loads of 8208, 26.8g-28g none were sub-moa. Listed below was my best group. I'm sure the poor performance was more me than the ammo. Best load was the 27.7 and in the future I won't load any hotter than 27.7. That max for my gun. Next loads I'm going to try are 27.3, 27.4, 27.5, 27.6, 27.7.

Powder - 8208
Charge Weight - 27.7

Case - AA(Lapua)
Primer - CCI 450
COL - 2.255

Barrel
Chamber - Grendel
Make - Liberty/Satrun
Length - 18"
Twist - 1-8

Average Group Size in MOA
Distance - 100yds
Largest Group Size - 2.9
Smallest Group Size - 1.7
Number of shots per group - 5

Temperature - 43 degrees
Humidity - 90%
Wind - 5-10mph @ 2 o-clock

[Whelenon]

No improvement over my previous reloads. For me the Nosler 125 Partition is a 2MOA bullet.

Powder - 8208
Charge Weight - 27.3, 27.4, 27.5, 27.6, 27.7

Case - AA(Lapua)
Primer - CCI 450
COL - 2.255

Barrel
Chamber - Grendel
Make - Liberty/Satrun
Length - 18"
Twist - 1-8

Average Group Size in MOA
Distance - 100yds
Largest Group Size - 4.475
Smallest Group Size - 1.642
Number of shots per group - 5

Temperature - 65 degrees
Humidity - 80%
Wind - 5-10mph @ 7 o-clock

[sneaky one]

Dang-Whelon--I just found this old thread, re-ignited after I posted data on the 129 sst units. OOps.. So, yeah---getting back to the seating depths- that may be the ticket on your issues.