300 Win Mag Load Help

[Paul Janzso]

Any one have any data they wish to share.
I intend using 230 gn Bergers.
Cheers
Paul

[AlanF]

Paul,

Your e-mail address in your forum profile is obsolete. That means you won't be getting notified about PMs or about replies to threads you have posted on. Just click on Profile under the forum heading to change it to your current e-mail address.

Thanks
Alan

PS I thought you would have graduated to 8mm by now!

[bruce moulds]

alan,
he will when there are 280 & 300 vld bullets in 8mm.
bruce.

[IanP]

Paul, I will answer your question by providing data from the Berger Reloading Manual. The data given is for a standard 10T, 26" barrel so add approx 30 fps for every extra inch of barrel. Looks like yours will be up and running well before mine is put together. With AR2225 and a 30" barrel, approx 2900fps should be available, which should be considerably more than your 300WSM could launch them at.

Lets just keep these 230 grainers and 300WM loads a secret so the 7mm boys wont jump on the bandwagon. Everyone knows 300WMs cant shoot straight

H1000 65.5gr - 2459fps : 72.9gr - 2711fps (AR2217)

Retumbo 69.0gr - 2489fps : 76.5gr - 2764fps (AR2225)

Ian

[Seddo]

Paul,
I am able to get 225 gr Hornadys out at over 2900 in the 28" tight twist barrel i bought from you. Not sure my load data will help as with the tight twist barrel i am running near min loads of 2225 and getting more velocity than the box max load. I settled on 208's doing 2945.

[bully_eye]

I'm using RWS 300WM brass- you may well be not- and it's HEAVY...and expensive. I doubt you would get as high velocity due to decreased boiler room but I'm guessing that a bit like the 180's in 7mm, you don't need massively high velocity to take advantage of those high BC 230gr Bergers...I'm only using baby 210 Bergers. I'm liking 2225 but load development is hard in NSW with few ranges allowing the big 30's.

Michael

[bruce moulds]

experience with recoil tells me i haven't got the balls to shoot such things.
i have for a long time put my upper limit on 30/06-7mm rem mag for repeated aimed shots.
above that i tend to go to pieces a bit.
i admire janzso's ability to retain precision with the 300 wsm.
for me to shoot like him with 284 recoil is a rare thing.
this experiment will be seen with much interest.
keep safe,
bruce.

[Paul Janzso]

Hi Alan.
I managed to change my details, I tried a while ago but gave up. I should have contacted you about it. Me and computers

Bruce, 300 grain 8mm Berger Hybrid, now ya talking.

Ian, I am basing my loads on 2213sc and standard rifle primers, CCI BR to start with and I ran my barrel in on Sunday morning then tried 5 loads increasing by .5 grain and 15 thou jump. I have chosen 2 of those loads and increased the jump to 30 thou and I have selected 2 more loads with the 30 thou jump as well. I would be trying them now as the sun is shining and the moon has aligned with what's its name but we had 3 inches of rain Sunday nite and I can't get to my bench as I don't have a boat, I will keep you informed.

Seddo, I am all ears, I only want to find a node in the 2,800 - 2,850 fps range.

Michael, I have RWS brass but the 8x68s formed to 30BOO BOO and it is superb brass.
I am using ( sorry Bruce ) Noslier 300 Win Mag brass, and it is well worth the cost. I weight sorted one box before I started loading and I got a variation of 3/10 gn, fabulous. All preped and ready to go. I use the 210 VLD's in my 300 WSM at 2,860 fps and that rifle is a winner but I am dabbling in the 300 WM to try and find a accurate load at the velocity I said above.
I am lucky as I don't have any trouble load developing, just google Isisford QLD.

Thanks Bruce
Cheers
Paul

[IanP]

Paul, its time you got yourself a MagnetoSpeed V2 chrono for your load development! Order online and its delivered 2 weeks later.
http://www.magnetospeed.com/

Ian

[Paul Janzso]

Update on load development
I was struggling with2213sc and Ian suggested I try the powders listed in the Berger book. I chose 2217 and compared Bergers charge weights with the ADI load data and previous load data from my Boo Boo days.
I loaded up 3 rounds each of 5 varying powder charges using 2217 and 30 thou jump. What a pleasant surprise , I found what I was looking fore the 3rd group was great and the 4th group was bench rest quality.
I will let you know how it goes at the Raglan OPM at Easter long weekend, I will be using it at 700, 800, and 900 meters.
Cheers
Paul

[SteveL]

Hi Paul
What barrel twist are you running in you 300WM.

Steve

[Paul Janzso]

Hi Steve
I use Krieger barrels, 1:10 t. 1.25" Straight profile.

Cheers
Paul

[SteveL]

Hi Paul
My 300WM is a 10t also, i have been thinking about 8 or 9 twists for those 230g ers.
When i built my 300 the best bullets were the 210's so a 10t was all that was needed.
I have found that AR2225 is the best powder in my rifle but i have only used it behind the 210's.
82grains of that powder gives me 3060fps.
I would be interested to to see how fast you can drive the 230's, have you cronographed any loads yet?

Steve

[Paul Janzso]

Hi Steve.
I'm not really looking fore blistering speeds with the 230gn Bergers just accuracy around the 2850fps area.
Saying that I don't have a chronograph but I think Ian Pavy is offering me his old crony so he can buy the latest model.
When I find an accurate load I just make range cards for the diferent rifle ranges I shoot at, so when I go to a OPM I know how much elevation to dial onto my scope.
With my 300 WSM I use the 210gn Berger VLD's and I'm only launching them around 2850fps. The rifle is comfortable to shoot, accurat and barrels are not burnt out over nite.
I will be using the 300 Win Mag on Sunday at a club shoot to get a 300 zero, I will let you know how it goes.
Cheers
Paul

[Seddo]

Paul,
I keep forgetting to look up my load data. I found this on my work computer, it was from the first firing i did while rnning it in.

My 300Win has a 28" 307 lawton barrel on it so the load data isnt compatible with everyone.

NOTE: EXCESSIVE PRESSURE IN MY RIFLE
79.7gr 2225 Hornady 208 Match Fed LMR OAL 3.700" - 3140fps with blown primer

77.9gr 2225 Hornady 225 Match Fed LMR OAL 3.700" - 2992 & 2978

All of the above charges are below the max load in the book and that why i chose them to run in the barrel. It also shows you what can happen when you get a tight bore rifle. The 225gr Match load didnt rupture the primer but there was excessise pressure signs and i havent tried the 225's since.