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30-378 Weatherby with 180 gr bullet speed?

 
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Old 04-03-2013, 08:27 PM
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30-378 Weatherby with 180 gr bullet speed?

What should I expect from a 26" barrel.... a sweet spot speed for the 30-378 with a 180 bullet...thanks
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Old 04-04-2013, 06:45 AM
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Re: 30-378 Weatherby with 180 gr bullet speed?

Every rifle's will have it's own sweet spots. You'll have to figure that out in load development. My 300 RUM shoots 180 E-Tips about 3430 fps with Retumbo. Your 30-378 should get close to 3500 I would think.
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Old 04-04-2013, 03:54 PM
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Re: 30-378 Weatherby with 180 gr bullet speed?

im at 3200fps with h1000...just wondering how hard to push them
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Old 04-05-2013, 07:11 AM
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Re: 30-378 Weatherby with 180 gr bullet speed?

If you believe the reloding books (who would do that?) you will top out between 3250 and 3350 fps for both the 300 rum and 30-378 roy. I'm at 3280 fps with a mid-load of rl25 with a 180 in my 26" 300rum, and have gone for more to prove it is there, but I'm in no hurry to tear up my bore.
I'd switch to a bit slower powder like rl33 in your 30-378 and she'll probably come up a couple of hundred fps (to low/mid 3400's)and have good pressures yet.
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Old 04-05-2013, 08:30 AM
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Re: 30-378 Weatherby with 180 gr bullet speed?

I would definitely try a slower powder. Maybe Retumbo. RL33 might be too slow for 180 bullets.

As far as how far you want to push them, that's up to you. I use manuals as guides. I use my rifle and brass to tell me how far to push my loads.
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Old 04-05-2013, 08:49 AM
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Re: 30-378 Weatherby with 180 gr bullet speed?

Quote:
Originally Posted by WEATHERBY460 View Post
What should I expect from a 26" barrel.... a sweet spot speed for the 30-378 with a 180 bullet...thanks
30-378 Wby is a nasty round! I hope to have one someday. Been wanting one for years.

I would think Retumbo, RL-22, RL-25, and something slower burning would be a good powder for the 30-378 Wby.

I'll look up the different powders Nosler and Berger recommend when I get home from work this afternoon.
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Old 04-05-2013, 09:14 AM
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Re: 30-378 Weatherby with 180 gr bullet speed?

As stated above, your rifle will tell you what it likes very few are the same . You easily beat 3200fps with your particular rig but you may have to switch to a slower powder to do it.

You didn't mention which bullet you were using so I offer this caveat, it has been said & documented that some of the thin jacketed Bergers don't get along with velocities 3250 & up. ESPECIALLY when your bore starts to get rough.


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