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Reloading Berger Bullets


7mm STW & 180 gr Bergers

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Unread 12-19-2008, 03:08 PM
Silver Member
Join Date: Mar 2003
Location: Grand Junction, Colorado
Posts: 239
Re: 7mm STW & 180 gr Bergers

Murray, I got a feelin' Santa's gonna be bringing me some ........left enough hints with everybody anyway. ;^)

I'll let you know if it happens and what kind of results I get.
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Unread 12-19-2008, 04:01 PM
Junior Member
Join Date: Nov 2008
Location: Norway
Posts: 17
Re: 7mm STW & 180 gr Bergers

Have anyone tried Vihtavuori powder like n165 with this combo?
American gunpowder is hard to get in Scandinavia.

The reloading data found here seems a bit slow I think:


I want to get over 3000 foot
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Unread 12-19-2008, 04:05 PM
Bronze Member
Join Date: Jun 2004
Location: Mississippi
Posts: 37
Re: 7mm STW & 180 gr Bergers

Hey, Longshot, got a few minutes between quail hunts and loaded a few rounds with the sizing die backed off so that only about 1/2 the neck of the case is being sized. Max load of 71gr of 7828SSC with bullet seated to 3.69 did the trick. OAL is still a little too long to feed through the magazine but, the first shot is the one that counts. Groups went from 3-4" to under an inch for 3 shots. I think I am going to a tool that will help me keep runout to a minimum. Groups should shrink a little more. Any more good advice?
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Unread 12-19-2008, 06:11 PM
Silver Member
Join Date: Oct 2007
Location: Flat Rock, Michigan, USA
Posts: 178
Re: 7mm STW & 180 gr Bergers

Chuck Boyer,

Factory chambers leave alot to be desired. Especially belted mags. But belted mags are good with a good chamber fit. Thus, partial neck resize or.... as I am preparing to do soon, rechamber or rebarrel to tighter tolerances. And, I will be able to get away from the expander ball neck sizing, as I will turn necks for neck consistancy, turning them such so that the resizing die alone reduces the neck to proper size for bullet tension, improving runout.

You don't have to do half the neck. About 0.060"-0.070" or so should do for positioning in chamber. But one thing you should do, get a truly flat, as in parallel sides, washer or spacer, and when you back off your die the appropriate amount, insert spacer between die and shellholder, raise ram snug against die, and tighten die. This will help to insure alignment of case to die for resizing.

You can partial size for a few rounds, but eventually brass will grow, and be difficult to chamber, because you are not full length resizing. At which time, you would need to full length resize one time, before resuming partial sizing. Your brass will last longer using this method, than with full length resizing.

Be sure to keep the bearing surface of your bolt lugs lubed.

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Unread 12-22-2008, 08:28 PM
Platinum Member
Join Date: Feb 2008
Location: IOWA
Posts: 2,123
Re: 7mm STW & 180 gr Bergers

I would also try the 168's. I get 3125fps w/79.8 gr Retumbo in a 26' Rock Creek barrel.I could push it alittle harder, but accuracy suffers,and Iwant to reload the brass more than once. I am surprised that Slymule can get 3200fps w/ the 180's, and as he stated, work your way into that one carefully.
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Unread 12-22-2008, 08:45 PM
Silver Member
Join Date: Mar 2003
Location: Grand Junction, Colorado
Posts: 239
Re: 7mm STW & 180 gr Bergers

I was surprised too, thats why it checked it with two different chronographs. All I can figure out is it must be a combination of alot of freebore and a fast barrel. DEFINATELY start out lower than my load as I have already stated, I'd hate to see somebody get hurt. I actually backed off .5gr because of sticky bolt lift, and leaving an extractor mark. I feel pretty comfortable shooting this load in my gun as it stands now, but if I were to shoot in the summer when temps were high, I'd have to back off further.
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Unread 12-30-2008, 09:11 PM
Bronze Member
Join Date: Dec 2008
Location: danville PA
Posts: 35
Re: 7mm STW & 180 gr Bergers

i shot 80.5 gr of retumbo and 180s out of my 30" lilja barreled 1 and 9 twist at 3200fps. also used same load with 175 matchking and worked pretty good as well. half inch 5 shot groups all the time but actually my favorite load is 81.5 gr and the 162 amax at 3320. shoots good and kills the hell out of deer and elk
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