Going Really big in the 30 cal.

[liltank]

Those deer in Williamsport must have some pretty darn thick hides to require 300gr'rs to kill'em.!!LOL

I wouldn't call it over kill. We were set up in a couple places that 1500-1800yds were very achievable. I know that I was under gunned for that kind of distance.

 

[dkhunt14]

Funny Matt, The 300 grainers let you see the wash and impacts farther out. Plus it has a lot of energy left for those really long shots. Matt

 

[geezerhood]

I am a fan of the 300 RUM for a big 30 cal case.
I have one in a savage sporter weight that shoots three shots out of a cold barrel in to about 3/4 MOA.

I also have an old Rem 700 that used to be a 7 Mag but now has a factory heavy barrel on it. It shoots sub 1/2 MOA with 180 SMK's and almost 1/4 MOA with Hornady bullets. It copper fouls horribly but is fun to shoot at 1K yard stuff.

My next RUM will be a 338 full length 300 RUM case of some kind on a Savage action. Just trying to decide on who will make the barrel.

 

[liltank]

My next RUM will be a 338 full length 300 RUM case of some kind on a Savage action. Just trying to decide on who will make the barrel.

I'll put in a shout out for Lothar Walther barrels. I have one on my .308 and it shoots great.

 

[dragman]

after a lot of thinking and idea's I skipped the big 30's and got a .338 LAPUA.

 

[Dgd6mm]

Sounds good, enjoy.

 

[liltank]

Well there ya go? Now do an improver version of that work horse! ;D

 

[Mooster1223]

I know you said you went with a 338 but, this is what I came up with for a big 30 cal. It's a 300 NM 40° Imp. Pictured with a 210 Berger. Hot load of H1000 got me up to 3280 fps in a 30" Brux seated in the lands. I'm going back out tomorrow to do some more development.

Case capacity is increased to 109 grains (left) from an original 103 grains (center). 243 on the right with a DTAC.

 

[spclark]

Mooster, you & TX65 ought to get together somehow. You two seem to be travelling the same road.... You anywhere near Houston by chance?

 

[Mooster1223]

Mooster, you & TX65 ought to get together somehow. You two seem to be travelling the same road.... You anywhere near Houston by chance?

Smack dab in the middle of Ohio.

 

[TX65]

Mooster, you & TX65 ought to get together somehow. You two seem to be travelling the same road.... You anywhere near Houston by chance?

My 300 SKADI based on the 300 Norma Magnum has a 40 degree shoulder BUT I went the other direction reducing case capacity. I form the 40 degree shoulder with dies, neck turn and am ready to shoot eliminating the need to fire form to blow out the case. My goal was to ideally tune the powder capacity to achieve certain performance goals for F-Open competition. As this is for F-Open, I have no muzzle brake and I have to work to be able to achieve performance over 60 score shots plus sighters.

First match out, I was shooting Berger 215's and scored 584-19x which was 6 points behind the winner (it was a very windy match). This was with very little load development and the load had 10 inches of vertical in it.

I have continued my load development and am now shooting 230 grain Berger Hybrids at 3120 fps (32 inch barrel). Was out yesterday (2/11/12) testing at 1000 yards and my refined load is shooting with less than 5 inches of vertical dispersion (that was consistent over 4 ten shot strings) with typically 5-6 shots of each 10 shot string falling into 3 inches. The 1000 yard test was done after 40 rounds of load work at 300 yards immediately beforehand with no barrel cleaning so the barrel was in a fouled match condition.

Can see tightening things up a little more sorting bullets, pointing them and testing different primers and neck tension levels.

Since I reduced case capacity from the original 300 Norma Magnum, all my loads with different bullets are running with 78-83 grains of powder which are all 98-100% load density. To evaluate barrel wear, I had my barrel bore scoped last week just to see how it was doing after 550 rounds and it is not showing any accelerated wear.

Here is a picture of my 300 SKADI next to a 6 DASHER.

 

[liltank]

Mooster, you & TX65 ought to get together somehow. You two seem to be travelling the same road.... You anywhere near Houston by chance?

My 300 SKADI based on the 300 Norma Magnum has a 40 degree shoulder BUT I went the other direction reducing case capacity. I form the 40 degree shoulder with dies, neck turn and am ready to shoot eliminating the need to fire form to blow out the case. My goal was to ideally tune the powder capacity to achieve certain performance goals for F-Open competition. As this is for F-Open, I have no muzzle brake and I have to work to be able to achieve performance over 60 score shots plus sighters.

First match out, I was shooting Berger 215's and scored 584-19x which was 6 points behind the winner (it was a very windy match). This was with very little load development and the load had 10 inches of vertical in it.

I have continued my load development and I am now shooting 230 grain Berger Hybrids at 3120 fps in a 32 inch barrel. Was out yesterday (2/11/12) testing at 1000 yards and my refined load is shooting with less than 5 inches of vertical dispersion (that is over 4 ten shot strings) with typically 5-6 shots of each 10 shot string falling into 3 inches. This was done after 40 rounds of load work at 300 yards immediately beforehand with no barrel cleaning so this the barrel was in a fouled match condition.

Can see tightening things up a little more sorting bullets, pointing them and testing different primers and neck tension levels.

Since I reduced case capacity from the original 300 Norma Magnum, all my loads with different bullets are running with 78-83 grains of powder which are all 98-100% load density. To evaluate barrel wear, I had my barrel bore scoped last week just to see how it was doing after 550 rounds and it is not showing any accelerated wear.

Here is a picture of my 300 SKADI next to a 6 DASHER.

That is what I am kind of looking for. That would be right around 300WM loads w/o worrying about case separation above the belt. Might have to keep you in mind when it comes time for my mag build. Also looking into the 30/375 Ruger a guy on another forum is working on.

 

[Mooster1223]

My 300 SKADI based on the 300 Norma Magnum has a 40 degree shoulder BUT I went the other direction reducing case capacity. .

I have continued my load development and am now shooting 230 grain Berger Hybrids at 3120 fps (32 inch barrel). Was out yesterday (2/11/12) testing at 1000 yards and my refined load is shooting with less than 5 inches of vertical dispersion (that was consistent over 4 ten shot strings) with typically 5-6 shots of each 10 shot string falling into 3 inches. The 1000 yard test was done after 40 rounds of load work at 300 yards immediately beforehand with no barrel cleaning so the barrel was in a fouled match condition.

I'm working with the 210 Bergers right now. I actually found good results jumping them 0.040" with 86.5gr of H1000 running around 3245 fps in a 30" tube. The 230's are next on my list for shooting steel out to 2200 yards. My rifle was throated for the 210's so, can I pick your brain on the 230's?

Do you find them to be jump tollerant? Where do you run them in relation to the lands. What powder are you using?

I have thought about trimming meplats and reshaping as well. I have ordered a Giraurd trimmer and will get the bullet trimmer before it ships.

Thanks

 

[TX65]

My testing has the Berger Hybrids achieving best results .010" - .015" off lands.

I have developed loads with the 230's using 7828, Retumbo and N570. N570 generates the highest velocity.

I was using N165 and H1000 with Berger 215's.

My h1000 charge was 79 grains to achieve 3100 with the 215's

 

[Mooster1223]

I'm having a hard time getting N570 here but, I would like to try it with the 230's. Thanks for the info.

Jim

 

[spclark]

I'm having a hard time getting N570 here but, I would like to try it with the 230's.

Where're you at? Bruno Shooters & Powder Valley Inc both have it in stock, but of course you'll pay shipping & HAZMAT to buy by remote.

 

[Mooster1223]

I'm having a hard time getting N570 here but, I would like to try it with the 230's.

Where're you at? Bruno Shooters & Powder Valley Inc both have it in stock, but of course you'll pay shipping & HAZMAT to buy by remote.

I'm in Ohio and hate the idea of paying a $28 Haz fee plus shipping for a $29 pound of powder to try.

 

[spclark]

Yeah I sympathize with your situation. There's a Cabelas near where I live but their selection is pretty spare. Closest retail VV dealer's 2-1/2 hours, one-way. When I order up by remote, I try to ask other shooters I know if they want in on a group buy & some do the same. Easy enough to spread the HAZMAT over more shooters than paying the fees all on my own.

 

[300 RUM]

Your not going to go wrong with the 300 RUM+208gr Hornady V-Max. It is a barrel killer at higher velocities, but for hunting you should get some good use form it.
I put one together about two years ago and loved hitting 5gal buckets at a 1K with it.
.300 bore/26" barrel (1.2" for 6" with a 3" taper to .975 the rest of the way. do it don't look back.
Of course "Retumbo" powder

 

[Dgd6mm]

I have 1 .300 RUM left for hunting, everytime I think about getting rid of it, I don't. This 1 is a 700 BDL 26" that is bedded, hand lapped lugs, muzzle brake from Billy Stevens. 200 yards 1/2 inch 5 shot groups with 180 NBT's and Retumbo. I've taken it to 1028 yards and was able to hit an 8" gong every shot after getting dialed in. Don't remember how many, over 5 under 10. That was consistent enough for me, for a hunting rifle.