.451 H4198 Accuracy/Primer Bulge testing

[Deleted]

Savage T/A .451 30" Pacnor 1 in 18" twist
300 MH
H4198 70-78 grains
Primer flame Channel 15/64"
.041" x 1-hole bushing

OK, wanted to look at accuracy and primer bulging with stout loads of H4198 and 300 MH's

No velocities, but my guess is the 78 grain load is ~ 3000 fps

Groups 1 and 2, I shot one after another and the last shot in group 2 is a flyer because the barrel was getting pretty hot

No primer bulging on Groups 1-3. I could flick the primers out with one finger
Group 4 there wasn't any bulging, but the primer face was popped back a little so one of the primers I really had to pry hard on with my fingers to get out.

Accuracy was pretty good, I'll try another group with 73 grains and a cooler barrel

[Deleted]

looks good to me Josh...that's a pretty stout load

[lwh723]

Nice shooting! I am stoked to get out and start playing with that .040 bushing in my gun with the 310. I've got a new 2.5-10 NF with zero stops to play with. Looking forward to using the bipod and ringing some steel at distance!

[airborneike]

Good shooting Josh.

Are the primers bottoming out on any inside shoulder and how tight do they fit?

Your "big dawg" should be home on Monday!

All the best

Mike

[Deleted]

Good shootin! Man would that combo be
HEdoubleL on critters!

[7mmfreak]

Aug 20, 2014 21:26:25 GMT -5 lwh723 said:

Nice shooting! I am stoked to get out and start playing with that .040 bushing in my gun with the 310. I've got a new 2.5-10 NF with zero stops to play with. Looking forward to using the bipod and ringing some steel at distance!

What size obj is your 2.5-10X? I have one each of the 24mm and 32mm and they are both great for the their purposes; DMR matches and hunting, respectively. I haven't got my hand on the 42mm as it came out right after my 32mm arrived. I should have a 5-25x56mmm F1 BEAST next week on loan from NF for testing and evaluation.

[7mmfreak]

Josh,

Nice shooting. Am I understanding correctly that the bushing vent diameter is .041" x 1" or am I misreading?

[Deleted]

Thanks guys!

Keith...ya the bushing is a .041" 1-hole.
The reason I put that on there, is that I have a bunch of 2 hole bushings as well.

[7mmfreak]

Gotcha, I wasn't sure if you meant you had a new bushing that was 1" long with a .041" vent hole running the length. There's no telling when you have something new cooking.