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.300RUM, .338RUM & .338Lapua

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Unread 10-29-2003, 11:41 PM
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Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,847
Re: .300RUM, .338RUM & .338Lapua


This is one of those tough questions that there is no clear answer for. In my opinion, the 338 Lapua is a great round but also carries alot of baggage with it, mainly high brass cost($2/brass).

The 300 RUM is my favorite of the group and I have them all and load alot for all of them. As an all around big game round, the 300 is very hard to beat.

The 338 RUM is also a great round also and perhaps for larger game at longer ranges, is a better big game round then the 300 RUM.

Interestingly enough, the last Norma 338 Lapua brass I measured for case capacity had one grain less capacity then my 300 RUM. With this in mind, the 338-300 RUM would have 2-3 grains more case capacity then the Lapua.

Also, it could be chambered in anything you like with a magnum length action plus brass is 1/4 the price of Lapua.

I agree brass quality is not up with the Norma and Lapua brass but with a little bench time and prep work, Rem brass can be made into very good brass.

All in all, for an out of the box extreme range big game rifle, the 338 RUM would be my top choice with the 300 RUM next and then the Lapua.

Good Shooting!!!

Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

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Unread 10-31-2003, 10:46 PM
Junior Member
Join Date: Jul 2003
Location: Arkansas
Posts: 19
Re: .300RUM, .338RUM & .338Lapua

I was fixing to start a post on choosing what next big caliber to get.
300WM,300WSM,300RUM OR the


I have heard people talk about the RUM not being around in the next 5 years or so,or not being popular. They say the WSM's are better and will be more popular for a longer period of time. WHat do you think of the 300WSM and the WSM in general?

I just want this for punching paper at long ranges.

The Boiler Room Bullet!
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Unread 11-03-2003, 02:47 PM
Bronze Member
Join Date: Jul 2003
Location: Bountiful, Utah
Posts: 71
Re: .300RUM, .338RUM & .338Lapua

I have to wonder about the latest short magnums. The WSM will probably stick around for a while. The WSSM is probably just too far "over the top" to survive. Too many $$$ per shot, and too few rounds in the magazine compared to what it's replacing.

The WSM is still enough of a magnum to make a case for it.

Just my $0.02, but then I may be wrong. Who knows? If I knew for sure I'd make a killing on the stock market!

Mark in Utah
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Unread 11-12-2003, 01:37 PM
Bronze Member
Join Date: Nov 2003
Location: Northern Ontario, CANADA
Posts: 44
Re: .300RUM, .338RUM & .338Lapua

I love the Lapua Mag. Yes I was lucky enough to get the First Batch made in 1993 by Sako. I hear another fellow member is having some problem with 300 gr bullets. His bullet has no grove in them and his barrel is a 1 in 10 twist as opposed to my ORG. 1 in 12 Twist. I use the 210gr. Nosler only and groups are very tite. Yes brass in Canada is $3.00ea., and I've reloaded the first 10 cases believe it or not 10 TIMES. No Problems and the load is really moving out.
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Unread 11-12-2003, 05:46 PM
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Join Date: Dec 2002
Location: Finland
Posts: 179
Re: .300RUM, .338RUM & .338Lapua

Hi there TH and welcome! [img]images/icons/smile.gif[/img]

Yep,itīs me having some problems, got it narrowed down by now though. 300 MK:s shoot good groups with low ES but there is some vertical drift after the first shot and itīs not heat or clean / fouled issue. Iīll get it figured out, it must be a "plastic" issue. [img]images/icons/grin.gif[/img]

Lapua brass can take many reloads with no changes. I have used some cases eight times to see how it goes. Just starting with MK:s.
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Unread 11-12-2003, 06:05 PM
Bronze Member
Join Date: Nov 2003
Location: Northern Ontario, CANADA
Posts: 44
Re: .300RUM, .338RUM & .338Lapua

Petander I have concern about vertical drift? Also, your contact in USA should send you a bottle of Sweets 7.62 Cleaning Solvent and clean up that bore. That Red Bore Stuff even indicates in his add that Sweets is better for getting that moly out. Glad to hear your working on the bullet-lapua problem. Lower ES is amazing for the 300gr. bullet.
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Unread 12-26-2003, 03:46 PM
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Join Date: Dec 2003
Location: Swoyersville, PA.
Posts: 24
Re: .300RUM, .338RUM & .338Lapua

Hello Express..

It's a no-brainer!!!Go with the 338 Ultramag in a Sendero.Brass is readily available and cheap.The heavier bullits will surpass anything in 30cal.and it will equal the capacity of the Lapua.I've been hunting with this caliber for two years and find it hard too beat.The punch down range is somethng to be witnessed.I also have a 338-378WBY TRR but that is a whole different animal.Just like Lapua brass it's expensive.The only SAKO chambered in 338 Lapua is the TRG-42 or the TRG-S.The TRG-42 is expensive and the TRG-S needs work.
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