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so my swede is now surpassing all my expectations... 26" 1-8 twist mcgowan shooting 140 amax @ 3000 with 47 gr H4350 COAL 3.132 (.01 off lands) with no pressure signs. Shot 6 different 3 shot groups this week, the smallest being .38" and the largest being .58".
I chose this caliber to be my long range high volume steel/comp gun
QUESTION:
since its pushing a 140 in the 6.5 x 284 territory is it going to burn the throat up after 1000 rounds ? even with only 47 grains of powder?
Thanks
I'm curious about this too, but have no experience in this realm. Tagged. Maybe Deano will enlighten us.
I'll hazard a guess and say no, as my understanding is that throats get burned due to the total volume (and type, and pressure curve, and rapidity of fire) of powder burned. But all else being equal, my GUESS is no.
Barrel nut we will see! really hoping i don't have to pull the barrel and get it re cut or put another on half way through summer! if i can get 2000 rounds + i will be more than happy
Hey Luke at the rate you are going you will be fine @ 1000 rounds, but by the time you reach 2000 rounds, the groups will have opened up a little,
Dean
Dean, what is the most rounds you have on a 6.5x55? how is the accuracy?
That's funny, due to the fact that I don't have anything that has ever lasted 1000 rounds, but I have set up others with this caliber and loaded for them and they have long barrel life, a longer case caliber will last a lot longer that a short fat one, even though they hold the same amount of powder and that goes for the case and the throat, what will happen will be for the first 1000 rounds it will be a match barrel, then by 1500 rounds it will be a target barrel, and by the time you are at 2000 rounds it will be a hunting rife.Quote:
Originally Posted by Stockrex
Dean
awesome thanks guys! i think i could get 3100 no problem, but an honest to goodness 1/2 moa gun at 3000 fps with a BC of .6, it will be a legit mile shooter !
I think you'll be surprised at the life you get from your barrel if you keep it cool. The narrower powder column compared to the 6.5.284 will help substantially. Most of the high dollar shooters using the 6.5x284 are loading to 2850-2950 because the accuracy falls off somewhat as unexplained fliers open up the group size. The node you're in sounds like a good one and if you take proper care of that barrel it should last quite a while. You really don't hear too much about Swede barrels going south early. I may just have to build a Swede for my youngest, that would give me another source of brass for my 6x55.
Yep i have been very impressed! there was a node with 45 gr of powder at 2820 FPS, and then another node at 47 2995 fps. extreme spread for 5 shots was only 7 fps! and i was round robbining 10 peices of brass and it took 4 neck sizes before having to bump the shoulder back with body die. easy bolt lift, primers arent flat, ect at 47 grains.Quote:
Originally Posted by Hotolds442
If you can keep the ES there throughout different temperatures, I wouldn't see the need to do any more load development since you have definitely found a sweet spot. Having a tight ES with a load that shoots accurately is 90% of the work. Time to stretch its legs and get your doping all set up!
Yes sir! can wait to blow the 6.5 Creedmore crowd out of the water with a 125 year old cartridge ;)Quote:
Originally Posted by Hotolds442