My new 600 overkill rifle is allmost ready now. Rifle barrels and action is ready and its feed great with empty ammo. But now i have problem with powder choise.

I life in Finland and that why Vihtavuori powder is easiest choice for me. So im extremly interested get reloading data for VV powder if anyone have it. And gun is with 25" pacnor barrel without muzzle brake so i need some about 600NE level starting data. And now i have only Barnes 900gr solid bullets. And lets see later what kind load its possible shot without brake. But now i need something where to start.

Now only waiting when stock is ready.... hopely this week.

Ukko

Hello Ukko,

Congratulations on the fantastic choice of caliber. I am very happy with it's power, accuracy and versatility.

I have some good starting loads with Vihtavuori and Barnes banded Solids at home and will PM them to you when I can - probably tonight.

Good luck and have fun!

Paul

Ukko- Congrats on your choice. I suspect though even the Tropical Load, 900gr at 1950fps will be a handfull with a unbraked gun. I see CCM doc has some reloading data for you. You need a powder approx as fast as IMR 7828. Id suggest you start out at 1800fps and work up. Lean into the gun like you would a shotgun but keep a tight hold on it. Dont ever let you face come off the stock. These guns feed flawlessly. What action was it built on and by whom if I may ask, as I keep records for the .600Ok Registry. Again Congrats and welcome-Rob

Ukko - sent you a PM. Send me your email address and I will email some load data.

First thanks for CCMDoc of help but i have Quickload and that data for 600NE we using ours test shooting.

Anyway we test VV N150 powder and start was 7,8g. Gun working great but we havent possible that time check bullet velocity. And then we testing also bigger load untill case was full. There fit 8,85g that N150 powder and gun was still easy to shot. So now waiting next week and N550 or mayby N540 powder.

I think that barnes solid is difficult load too hot because case capisity get full before pressure get too hight. I have to also try find somewhere woodleight bullets and i think maximum energy will get with those bullets.

I was little suprising how easy gun was shot. Gun weight now 6,0kg so it takes ofcourse recoil away but anyway without muzzle breake recoil is still easy to handle. And i dont need muzzle breake for that rifle. Mayby in future will take material away from barrel and get weight little down. But now first more test shooting.

But what kind speed you have that caliber with barnes solid bullets with other powders? I think with VV powder max will come some 670m/s or 2200fps. But that is now only my quest not sure.

Hi Ukko,
Congratulations from me too for a successful BIG bore project! It's nice to know that the 600 OK isn't just a distant dream even here in Finland. Could you tell us who made the rifle? You see, especially some of us Finnish members might start to feel that our 458 Win Mags just don't cut it anymore...

Laita vaikka yksityisviestiä, jos et halua julkistaa sepän nimeä. Yksityisviestin lähettäminen onnistunee kun klikkaat käyttäjänimeä, valitset sieltä 'View public profile' ja sitten 'Private Messaging'. Sepän lisäksi kiinnostaisi tietää, että mitä projekti kustansi ja oliko erityisiä vaikeuksia esim. lupa-asioissa ja (lataus)komponenttien hankkimisessa. Ulkoilutatkos asettasi muuten Afrikassa vai saako kotimainen suurriista kylkeensä oluttölkin mentäviä reikiä? Olisi myös erittäin mielenkiintoista lukea tarkempi esittely aseestasi jostakin aselehdestä; itse ottaisin yhteyttä Rekyyliin.

Kiitoksia tiedoista! / Thanks!

quote:

Originally posted by Ukko:
First thanks for CCMDoc of help but i have Quickload and that data for 600NE we using ours test shooting.

Anyway we test VV N150 powder and start was 7,8g. Gun working great but we havent possible that time check bullet velocity. And then we testing also bigger load untill case was full. There fit 8,85g that N150 powder and gun was still easy to shot. So now waiting next week and N550 or mayby N540 powder.

I think that barnes solid is difficult load too hot because case capisity get full before pressure get too hight. I have to also try find somewhere woodleight bullets and i think maximum energy will get with those bullets.

I was little suprising how easy gun was shot. Gun weight now 6,0kg so it takes ofcourse recoil away but anyway without muzzle breake recoil is still easy to handle. And i dont need muzzle breake for that rifle. Mayby in future will take material away from barrel and get weight little down. But now first more test shooting.

But what kind speed you have that caliber with barnes solid bullets with other powders? I think with VV powder max will come some 670m/s or 2200fps. But that is now only my quest not sure.

Yes I started with data from QL and have used and chrono'ed loads with N550 and N560. Never tried N150, though.

Good luck and congratulations - the fertile mind of Robgunbuilder produced a real winner.

Yea - congrats with a good choice of caliber. I went with the 577 Tyrannosaur (before the 600 OK was born) otherwise who knows - I might have chosen the 600
You will experience that the VVN 550 and 540 powders are more dense than 150 powder and therefore you will be able to have more garins of 550 or 540 compared to 150 in your brass.. I think that 550 will give the best results in your 600. In Saeeds loadings for the 600NE in his Heym rifle, the best vel was acheived with 550 powder ( see http://www.accuratereloading.com/600nitro.html ) Same in my 577 Tyrannosaur, I get almost 2500 f/s with a 800 grain GS Custom FN solid .

None of these are Vihtavouri powders but here's what I've come up with in my 24" AHR barreled Enfield:

Rifle Bullet Type Grains Charge Powder Primer Velocity Case Exp Ring
24" Enfield Fairbanks Turned Solid 750 150 BL-( C )2 Fed215 2258 0.6595
24" Enfield Fairbanks Turned Solid 750 160 BL-( C )2 Fed215 2188 0.6602
24" Enfield Fairbanks Turned Solid 750 157.5 BL-( C )2 Fed215 2180 0.6601
24" Enfield Fairbanks Turned Solid 750 155 BL-( C )2 Fed215 2116 0.6588

24" Enfield Fairbanks Turned Solid 750 155 H4895 Fed215 2503 0.6607
24" Enfield Fairbanks Turned Solid 750 152.5 H4895 Fed215 2455 0.6607
24" Enfield Fairbanks Turned Solid 750 150 H4895 Fed215 2427 0.6607

24" Enfield Fairbanks Turned Solid 750 165 IMR4350 Fed215 2130 0.6596

24" Enfield Fairbanks Turned Solid 750 165 IMR7828 Fed215 1915 0.6597

24" Enfield Fairbanks PaperPatch 820 160 IMR7828 Fed215 1800 0.6596
24" Enfield Fairbanks PaperPatch 820 150 IMR7828 Fed215 1750 0.65855

24" Enfield Fairbanks PaperPatch 860 150 IMR7828 Fed215 1785 0.6593
24" Enfield Fairbanks PaperPatch 860 150 IMR7828 Fed215 1780 0.6592
24" Enfield Fairbanks PaperPatch 860 150 IMR7828 Fed215 1740 0.659

24" Enfield Fairbanks PaperPatch 860 150 RL19 Fed215 1675 0.659

24" Enfield Fairbanks PaperPatch 860 45 Trail Boss Fed210 1200 mild
24" Enfield Fairbanks PaperPatch 860 50 Trail Boss Fed210 1190 mild
24" Enfield Fairbanks PaperPatch 860 40 Trail Boss Fed210 1180 mild

24" Enfield Woodleigh WeldcoreSP 900 170 BL-( C )2 Fed215 2280 0.6605
24" Enfield Woodleigh WeldcoreSP 900 160 BL-( C )2 Fed215 2090 0.6596
24" Enfield Woodleigh WeldcoreSP 900 150 BL-( C )2 Fed215 2060 0.66

24" Enfield Woodleigh WeldcoreSP 900 170 H414 Fed215 2200 0.66
24" Enfield Woodleigh WeldcoreSP 900 175 H414 Fed215 2120 0.6596
24" Enfield Woodleigh WeldcoreSP 900 160 H414 Fed215 2030 0.6593
24" Enfield Woodleigh WeldcoreSP 900 150 H414 Fed215 1900 0.6592

24" Enfield Woodleigh WeldcoreSP 900 165 H4831 Fed215 2000 0.6594
24" Enfield Woodleigh WeldcoreSP 900 160 H4831 Fed215 1975 0.6594
24" Enfield Woodleigh WeldcoreSP 900 150 H4831 Fed215 1775 0.6587

24" Enfield Woodleigh WeldcoreSP 900 147.5 IMR4064 Fed215 2210 0.6605
24" Enfield Woodleigh WeldcoreSP 900 145 IMR4064 Fed215 2165 0.6603
24" Enfield Woodleigh WeldcoreSP 900 140 IMR4064 Fed215 2125 0.6601
24" Enfield Woodleigh WeldcoreSP 900 142.5 IMR4064 Fed215 2115 0.66
24" Enfield Woodleigh WeldcoreSP 900 130 IMR4064 Fed215 1925 0.6593
24" Enfield Woodleigh WeldcoreSP 900 120 IMR4064 Fed215 1700 0.6576

24" Enfield Woodleigh WeldcoreSP 900 170 IMR4350 Fed215 2180 0.6606
24" Enfield Woodleigh WeldcoreSP 900 165 IMR4350 Fed215 2140 0.6605
24" Enfield Woodleigh WeldcoreSP 900 160 IMR4350 Fed215 2100 0.6603
24" Enfield Woodleigh WeldcoreSP 900 150 IMR4350 Fed215 1960 0.66

24" Enfield Woodleigh WeldcoreSP 900 170 IMR7828 Fed215 2000
24" Enfield Woodleigh WeldcoreSP 900 160 IMR7828 Fed215 1850 0.6594

24" Enfield Woodleigh WeldcoreSP 900 170 RL19 Fed215 2100 0.6602
24" Enfield Woodleigh WeldcoreSP 900 160 RL19 Fed215 1900 0.6592
24" Enfield Woodleigh WeldcoreSP 900 150 RL19 Fed215 1725 0.6588

24" Enfield Beartooth Cast FN 1040 150 IMR7828 Fed215 1870 0.6602
24" Enfield Beartooth Cast FN 1040 45 Trail Boss Fed210 1160 mild
24" Enfield Beartooth Cast FN 1040 40 Trail Boss Fed210 1125 mild
24" Enfield Beartooth Cast FN 1040 50 Trail Boss Fed210 1115 mild

Now we have shooting some load more and checking also velocity. Anyway i still wait N550 powder and hope i get that soon.

Now we check first 7,8g/N150 powder with Barnes 900gr solid. And velocity was 520m/s.

Second load was maximum what fit in case 8,8g/N150 and speed was 630m/s.

Reason why we choose 2 so different kind was because some my friend want test that rifle and that lower load is really easy to eveyone to shoot. And second one is allmost maximum what is possible with that powder and that bullets. There maybe fit little more but not much. But still its not limit what rifle can handle its only limit what fit in case. There is not any pressure sign of case.

I aslo find woodleigh SN bullets from Sweden. And waiting those arrive couple weeks later. Its funny how difficult is found bullet or even dealer who is interested order bullets of that caliber. Ofcourse i dont wait that some dealer have those bullets in stock in Finland but its common answer when ask bullets that " are you grazy, what you think shoot by those....?". And when ask can they order next answer is how expensive bullets is and difficult get and mayby they get those 6 month later.....
But no matter now i find dealer who is interested order those and that good.

One problem i have with stock. I have now laminated wood stock and afraid its not strong. Stock have 3 recoil bolt throught and even that it looks crack little. Its not so big deal because i know stockmaker well and we allready speak if it go broken he will fix it.

But do you have recommed what kind stock is best? I have see many stock even 50bmg make laminated like this and it working so i think its possible make stock by laminated what is strong enough.

Ukko- Good shooting! I forgot what barrel length your using. My velocities are higher but I have a 26 inch three groove barrel with a RGB brake on it.. Usually BL-(C)2 about 180gr, H414 and H4350 give max velocities in the .600Ok. BTW are you using a 36 inch drop tube to add your powder? If not you wont get the max amount in the case. As far as stocks go, both of mine are walnut but steel bedded. with a good barrel mounted lug your stock should not split.-Rob

Sorry if i forget tell but my gun is also pacnor three groove barrel. Lenght is 62cm so its about 24 1/2" I dont use long drop tube and like i say there propably fit more powder but not much anymore.

Using other than Vihtavuori powder is quite difficult here. And i think i dont even need (not yet...) maximum velocity what its possible.

And i have also good steel lug in stock but lets see now what happend like i say stock is not yet broken but it looks like some mm long crack had come. Mayby i worried too much but i totally exploded one Sako original wood stock last summer so its still in my brains....

But anyway im really happy of rifle and waiting autumn when i can shot first moose by that and woodleigh SN bullets. This rifle and 338LapuaMag and i think moose dont run far away...

Ukko- I think you will find the .600Ok will be adequate for Moose! Wont roll far at all! Try the Drop tube as it makes a BIG difference as does using once fired brass for max moosepower!-Rob