338 Lapua and 375 Cheytac bolt face

[DoubleGobble00]

What is the bolt face size of the 338 Lapua and the 375 Cheytac? I want to say the 375 Cheytac is a tad larger bolt face but I am not sure. Anybody got the dimension? Are they the same?

Thanks,

DoubleG

 

[Louis Corkern]

Re: 338 Lapua and 375 Cheytac bolt face

Why not just look at your bolts??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: DoubleGobble00</div><div class="ubbcode-body">I just bought a BAT 1.55 MB action with a magnum bolt face and a cheytac bolt face. </div></div>

The 375/408 operates on a bigger boltface than the 338LM. The original 408CT brass was based off the 505Gibbs that was modified. The 375/408 uses same brass as the 408CT

Thanks

 

[DoubleGobble00]

Re: 338 Lapua and 375 Cheytac bolt face

HA... Well the magnum boltface I have is for just a regular mag like a 300 RUM, 300 win mag, etc. The other one I could measure when I get home to see what I come up with.

I was just curious if the 338 Lapua and Cheytac were the same bolt face or not.

Thanks for your help!

DoubleG

 

[Louis Corkern]

Re: 338 Lapua and 375 Cheytac bolt face

408 Cheytac Info
Parent case .505 Gibbs
Case type Rimless, bottleneck
Bullet diameter .408 in (10.4 mm)
Neck diameter .438 in (11.1 mm)
Shoulder diameter .601 in (15.3 mm)
Base diameter .637 in (16.2 mm)
Rim diameter .640 in (16.3 mm)
Rim thickness .065 in (1.7 mm)
Case length 3.04 in (77 mm)
Overall length 4.307 in (109.4 mm)
Case capacity 159 gr H2O (10.335 cm³)
Rifling twist 1 in 13 in (330.2 mm)
Primer type Large Rifle
Maximum pressure 63,800 psi (440 MPa)

338LM Info
Parent case .416 Rigby, .338/416
Case type Rimless, bottleneck
Bullet diameter 8.58 mm (0.338 in)
Neck diameter 9.46 mm (0.372 in)
Shoulder diameter 13.82 mm (0.544 in)
Base diameter 14.91 mm (0.587 in)
Rim diameter 14.93 mm (0.588 in)
Rim thickness 1.52 mm (0.060 in)
Case length 69.20 mm (2.724 in)
Overall length 93.50 mm (3.681 in)
Case capacity 7.40 cm³ (114 gr H2O)
Rifling twist 254 mm (1-10")
Primer type Large rifle magnum
Maximum pressure 420.00 MPa (60,916 psi)

300WM Info
Parent case .300 H&H Magnum
Case type Belted, bottleneck
Bullet diameter .308 in (7.8 mm)
Neck diameter .339 in (8.6 mm)
Shoulder diameter .489 in (12.4 mm)
Base diameter .513 in (13.0 mm)
Rim diameter .532 in (13.5 mm)
Rim thickness .049 in (1.2 mm)
Case length 2.62 in (67 mm)
Overall length 3.34 in (85 mm)
Rifling twist 1:10
Primer type Large rifle
Maximum pressure 62,366 psi (430.00 MPa)
Maximum CUP 54,000 CUP


The 375/408 uses same brass that is just necked down to 375 or can use the newer 375 Headstamped brass that already necked down.

 

[DoubleGobble00]

Re: 338 Lapua and 375 Cheytac bolt face

Thanks Later.. I appreciate it!

DoubleG