18" barrel, best 500 yard ballistics?

[JAYgs8163]

I'm very interested in this thread. I have a Mack Brothers mag face short action and a Grayboe Phoenix stock. Will be running a 18" barrel and am trying to decide on caliber also. Thinking a 270 WSM or something in the 7mm but still undecided.

 

[Mammoth Hunter]

I am a fan of short barreled long action hunting rifles. I have recently developed several wildcats based on the 375 Ruger brass shortened to 2.255 inches and necked down to .338, .284, and.264. this allows looong bullets in a standard action. The ballistics are comparable to the 338 win mag, 7mm rem mag and 264 win mag. The 338 MKS fires a 300 grain bullet at 2400 fps and 4000 ft lbs. out of a 18 inch barrel.

 

[JAYgs8163]

I'm very interested in this thread. I have a Mack Brothers mag face short action and a Grayboe Phoenix stock. Will be running a 18" barrel and am trying to decide on caliber also. Thinking a 270 WSM or something in the 7mm but still undecided.

 

[Slick8]

Here's the berger ballistics showing a 230 berger at 2500 fps at sea level.

I'm quite sure I can do this in a sherman short or max. Question is, what's the shortest barrel that will accomplish the goal. Im also hoping to use H4350 or Varget since I have 8 pounds of each.

Ample velocity to 500 yards imo. The only concern is the drop is considerable meaning accurate ranging is a must.

 

[richhymas]

I'm in the same boat and will say if you can get a heavy and high bc 6.5, 7 or 30 cal to 2500 plus you're good to 500.

I'm wanting to do a short mag 30 at 16.5 suppressed running a 230 at 2500 plus as a goal. Not sure if its realistic at 16. It seems in that combo at least that 20 inches is the magic number for efficiency.

If you want a short barrel you want faster burning powders so a short magnum and lighter for caliber bullets. You will get better results out of a 180-200 grain bullet with one of the faster burning powders listed for the load. Better MV, flatter and harder hitting out to 500 yards. Longer ranges require a better BC so heavier bullet snd slower powder and thus a longer barrel.

 

[new2mud]

I've got one of my 6.5 PRCs with an 18" barrel pushing 156 EOL over 2800 FPS (short action). With a suppressor it is an absolute joy to shoot, and I have 800 rounds on it so far.

A short Sherman would be even faster—I imagine that would be really hard to beat.

 

[MGM7]

I was looking for this same rifle for mule deer season in Colorado this year. After reading in on this forum, I settled with a 6.5 Sherman Short Tactical. 18" carbon Broughton barrel with Nosler 142 ABLR at 2950 fps with a Ultra 9 can on it.It should jump up to 3050 fps after 150-200 rds. I have 100 rounds so far down the pipe, shows promise at 500 yards (1.5 inch groups).This is with N565 powder 60.5 grains,I just received some R26 powder from powder valley and will do some load testing after mule deer season.

 

[nmbarta]

I was looking for this same rifle for mule deer season in Colorado this year. After reading in on this forum, I settled with a 6.5 Sherman Short Tactical. 18" carbon Broughton barrel with Nosler 142 ABLR at 2950 fps with a Ultra 9 can on it.It should jump up to 3050 fps after 150-200 rds. I have 100 rounds so far down the pipe, shows promise at 500 yards (1.5 inch groups).This is with N565 powder 60.5 grains,I just received some R26 powder from powder valley and will do some load testing after mule deer season.View attachment 226956

Yessss!!!!!!!
That's awesome!!!!
Perfect

 

[hzy1369]

since you already have the suppressor stick with it. Besides a short barrel plus suppressor equals a long barrel. Unless you want short action then 300WSM

300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16″ 300 Win Mag? – rifleshooter.com

 

[ruby76]

300 Sherman short for a short action or 300 Sherman max for a mid or long action.

 

[Montucky Roamer]

You might want to look into what the specialty pistols run. Max performance with that barrel and a 30 cal can will be the biggest case you care to run in a lapua sized action. 300 Terminator? If limiting to a short action then yes, probably the 7 or 300 sherman short mag and maybe run the new absolute hammers in it for hunting. I'm getting thoughts in this direction myself. $$$

 

[Good]

Still waiting on someone to wildcat (Ackley) the Lazzeroni 8.59 Galaxy for me to blaze ~270g pills. Mammoth Hunter, do something similar but start with a 338 Lapua cartridge and keep it true short action based around the 270g ELD-X or other 250g bullets.

 

[cohunt]

7wsm

 

[RiverShooter]

I read a study years ago, can't verify it, on efficiency in short barreled rifles. The 270 Win was the most efficient in comparison to the 308 Winchester and 30-06 Springfield. That was in the 1990's and a lot has changed since then. Maybe a starting point.