180 Grain Bullet 3400 FPS or better

[BPollard]

Is there a caliber out there that isn't a fire form wildcat (one step neck down "wildcat" is fine) that can send a 180 Grain bullet at 3400 FPS or better and shoot/group well? This would strictly be a hunting rifle. Action length doesn't matter. Bolt face doesn't matter. Barrel Burner doesn't matter.

I dont believe 7STW, 7- 300 WBY, 28 Nosler will get you there


Looking more towards 7mm because of better BC. Any input would be appreciated. 28" max Barrel length, preferably a 26" Barrel

Thanks

You dump a 180 Accu bond in a 338 WinMag
That will scream Close to 3300

 

[ndking1126]

Ok OP. You talked me into it. I've gotta 7RUM in the safe that will be "our" Guinea pig . Got a fresh box of adg brass and some 180 Berger's. I'll let you know what it'll do all the way up to the point of having to beat the bolt open.
give me a few weeks to get it in my schedule.

Subscribing for results!

 

[1894C]

7mm is no longer relevant in the bc dept.

?


+1 to see the results. I had a 7rum that shot 183 SMK 3325 FPS with rl26. 28" Krieger 1:8.

 

[jessej]

?


+1 to see the results. I had a 7rum that shot 183 SMK 3325 FPS with rl26. 28" Krieger 1:8.

How was bolt lift? Ejector mark? Primer?

 

[longrangebo]

How was bolt lift? Ejector mark? Primer?

I had a 7mm416 rigby that would send 162 hor. out at 3650 but I never tried a 180, I think they would come apart,

 

[dogz]

He said in original post prefers 26 but will go up to 28.

Many thanks, I knew I'd seen it somewhere, my ADD wouldn't let me find it. Start at the start I guess

 

[1894C]

How was bolt lift? Ejector mark? Primer?

Pressure was at 3375 FPS. Absolutely no pressure before that. Single shot off a 40X action

 

[jessej]

I don't mind pressure until we start loosing primers or sticky bolt lift.

 

[hawg chaser]

Ok OP. You talked me into it. I've gotta 7RUM in the safe that will be "our" Guinea pig . Got a fresh box of adg brass and some 180 Berger's. I'll let you know what it'll do all the way up to the point of having to beat the bolt open.
give me a few weeks to get it in my schedule.

I'm very curious about how this turns out.

 

[dogz]

Hodgdon (which uses actual pressure tested data) has 4 loads using the 175's. 24" barrel, all 4 of the loads are sub 3100

Just a thunk

 

[dogz]

add another 4" of barrel and you'll add another 120 fps give or take. Might make 3200 with either the RUM or the 28 and keep sane pressure limits in sight

 

[264MHC]

So I've been running some numbers in Quickload with the following parameters:
65000 psi max
.33 Weighting Factor (recommended for overbore cartridges, not sure how it translates to reality)
180 Berger Hybrids with bearing surface Seated .200 into the neck (assuming optimum free bore for various cartridges)

This might turn into a book but here are the takeaways:
28" barrel minimum regardless of Cartridge, 26" just won't do it.
110 Grain water capacity minimum
Ramshot LRT, VV N570, R33, or R50 are the only powders that will do it.
Adding 2" of barrel adds 80fps on up to a 40", adding 10 grains of water capacity in the same barrel length only nets 30ish.

The cartridges I looked at:
7-300 Norma Mag 104 Water-3330
7-300 Norma Improved 110 Water 3390
7 Rum 112 Water-3400
7.21 Lazeronni Firebird 121 Water- 3430
7-378 Weatherby 124 Water - 3435
7-33XC 134 water - 3460

I still choose the 7-300 Norma improved as it's the only one on the list that makes the mark and will Mag feed without a special box. I would also still choose the 190s (3320) as they have less drop and drift and a lot more velocity and energy at 1k than 180s at 3400.

 

[Swamplord]

Prefer zipping out 195 gr Berger & 197 gr SMK's out at 3300 fps, 180 gr bullets need not apply,

just bought him lunch last night, Reloder 50 and 190 gr A-Tip's .... will see how it goes

....

 

[6.5x300 WBY]

Prefer zipping out 195 gr Berger & 197 gr SMK's out at 3300 fps, 180 gr bullets need not apply,

just bought him lunch last night, Reloder 50 and 190 gr A-Tip's .... will see how it goes

....View attachment 236539View attachment 236540View attachment 236541View attachment 236542

What case is that off of.?

Thx