41xc 37xc 33xc and 30xc

[25WSM]

Them some big guns.
Shep

 

[TXAoudadKlr]

I finally had time to build my 30-33xc. Did some pressure testing yesterday. 7 shots starting at 119 grains Vihtavuori 20n29 to 126 grains. Speeds started at 3254 and went up to 3325 fps without any pressure signs. I will post results once I get the load dialed in.

338 Lonepeak Fuzion Action
32" 5R Bartlein 1-9 twist
TriggerTech trigger
Mcmillan Adjustable Game Warden stock
Nightforce 5.5x22x56 moart
View attachment 232656View attachment 232656View attachment 232659View attachment 232660

What weight bullet?

 

[Overkill338]

Why no 35xc?

Why not a 32xc, 36XC, a 411XC, 416xc,44xc

 

[GLRUT]

245 grain Berger's

 

[gnbruce]

the 41 is a 416 the rest have limited bullet selection

 

[TXAoudadKlr]

I mean you can do a 32/8mm or 358 but you'll be limited to like 2 bullets!

 

[TxDerek]

Any more updates on the 30xc? Have you guys tried the heavy solids? I am running my 33xc 30" 1:9.3T at 3365fps with coated 265gr Badland solids. Tested the 265s up to 3569fps with n570 and was definitely in pressure. I'm curious to what a 30xc with a long barrel (32"+) with a heavy solid like the 241gr Seneca with its claimed 0.555g7 with a slow powder could produce ballistic wise? 3300-3400+ fps consistently?

 

[MagnumManiac]

I just figured this out yesterday. The XC line is almost identical to my own 338-416 Rigby Improved, only difference is body taper and I ran a 45 degree shoulder, instead of 35 degrees.
I came up with this a decade ago and build them on CZ550 Safari Magnums.
Can't run the exact same pressures as Lapua brass, but close enough.
I'm running a 32" barrel with 1:8.5" twist.

Cheers.

 

[Bravo 4]

What kind of performance you getting?

 

[gnbruce]

30 xc 240 grain ceb lazer 3300 6 twist 30 inch 125 20n29 borerider chamber 3300

 

[TXAoudadKlr]

I don't really want for more with my 300 Raptor pushing 245's at 3400fps

34" 1-8.5 twist

 

[gnbruce]

I don't really want for more with my 300 Raptor pushing 245's at 3400fps

34" 1-8.5 twist

yes we like the eol 245 grain wont shoot in our 6 twist and will in our 7 twist 32 inch @ 3350

 

[gnbruce]

we will be shooting the 46xc in the next week or so with the ceb 600 gr lazers 32 inch 10 twist

 

[TXAoudadKlr]

With the 1:6 was it ripping them apart?