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Highest Rifle Velocity
5278 fps in .22-243 Middl.
5130 fps in .22-250 Ack Im

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14412 ft-lbs in .700 NE
13109 ft-lbs in .50 BMG




.30-06 Ackley Improved

2 loads available in .30-06 Ackley Improved with bullet equal "Sierra Gameking". Click on LoadID to show all the details for the given load.
(Sorted by bullet weight)

LoadID Bullet weight Powder Velocity
11313 150 grs IMR 4064 2980 fps
9135 180 grs Alliant Reloader 22 2900 fps

Records 1 to 2 of 2

Bullet review
.375 MOA at 300 yards with Sierra Gameking 130 gr. I loaded Win Brass and Win Primer with 56gr H4831sc 2920 FPS. 3 shot group fired from 300 yards measured 1.125 inches. The rifle was a Ruger M77 MkII. Bullets were seated 2.815 inches from the base of the cartridge to the bullet ogive which allowed .005 inches of free jump. Identical results were achieved from 200 yards the day before. Shot a doe with this load from 241 yards. Bullet broke through a rib, heart, lungs and exit wound the size of a quarter. It's a great load for white tails and antelope in my rifle.
Submitted by: ghhughey
E' una palla che non perdona, ferma tuttoIo ho cacciato Daini, Cinghiali, Cervi, Mulfoni, Caprioli, tutti a distanze oltre i 180 mt. con abbattimenti immediati e puliti. Io carico cosė. 54 grani di Vihtavuori N150 in estate (18-35°) 55 grani di Vihtavuori N150 in inverno (0-18°) palla 130 GK SPBT H. cartuccia finita a mm 84 innesco(primer) : CCI 200BR- Fed.210GM bossolo (case)= FC + Factory crimp. LEE Rinaldo - Italy
Submitted by:
I've reloaded the 150 SGK in my 270 for many years. Absolutely the most accurate bullet for this rifle I've tested. Its taken many deer over the years - Broadside, quartering both ways and high shoulder shots. All but one were complete pass throughs. They went in bullet size and came out with less than 2" exit holes. Up until last year I would have given them a "6" (the best) hunting performance, except for the one - It came apart before it hit the deer. This shot was 45 yards broadside. I did get a DRT deer. But, none of the bullet pieces hit where I was aiming. One piece, luckily, hit the neck bone about 9" from the POA. Two other pieces hit - 1 in rib section and the other in the hind quarter. Plus, could have been more pieces I can't account for! Took 20 more rounds of this same reload batch to range following weekend - All held together and performed great.
Submitted by: RaySendero
I have used 130 gr Sierra Gamekings in 270 Win for several years taking many animals from coyotes, Upstate NY Whitetails and California Blacktails. All animals dropped like hit with the hammer of Thor. I use Reloader 22 and get 3000 fps. My shortest shot was 30 yards and my longest was 236 yards. Exit holes are typically about the size of a quarter. I'm not sure where these bullets get a rap about blowing up. I have found quite the opposite. They work great and after testing Nosler, Hornady and Swift, I found these bullets to be the most accurate by FAR. I shoot 1/2 to 3/4 inch groups @ 100 yds. I glass bedded and free floated an old Browning A-bolt for a buddy. He had given up on this rifle. I loaded up some 150 gr GK and they shot 3/4 inches all day long. He now once again uses this rifle. Don't believe what you read about these bullets not holding together. They work great and are superbly accurate.
Submitted by: ERJ
Please excuse the typo.... Gamekings should not be used for short range high velocity.
Submitted by: Ralph from NJ
As I read reviews on these bullets from other sources, it's said that Sierra bullets are too soft, come apart upon impact, blow up per say.... etc....... So opinions will fly. Well opinions caused me to invetigate for myself to ask Sierra wha the deal is. Carroll Pilant explained to me that the gamekings are designed for short range high impact shooting at game. The Prohutner is... the flat base prohunter is designed to hold up against short range high velocity impact, and the gamekings are for long range work. The Gamekings have to have time to slow down in order to not come apart upon impact. SO be it as it may, apply the right bullet at the right velocity at the right range and you'll be fine. Sierra make one heck of a bullet.
Submitted by: Ralph from NJ
excellent on small game, but not as explosive as other hollow points i've used in the past. A very accurate bullet.
Submitted by: bailey
I have used the Sierra Gameking Spitzer Boat tail 165 grain bullet in my .308 and 30-06 for 30 years. For deer and antelope, there is nothing better. Recovery of a bullet is rare, with match grade accuracy and large exit holes, it is great on deer. I have hit mule deer in the shouldeer and had exit wounds the size of baseballs. My family and I have killed at least 50 animals with them. I have killed several elk at ranges up to 300 yards and do prefer a heavier jacketed bullet for these large animals that stays together better and penetrates deeper, though I never lost an elk because of jacket core separation.
Submitted by: Spider
My favourite Whitetail bullet. Have used the 165 gr. Boattail for ten years, and have had great results. I don't care too much about the bullet staying together as much as dynamic and instant death. This bullet craters bucks. I find the bullet weight just right for long range deer, and have taken several large whitetail bucks (250'lbs +)in northern Alberta, from 150-500 yds. They just go down. I do lament the discontinuation of Federal's High Energy load with this bullet as it was in my mind the ultimate whitetail death ray. I was getting 3030 fps and cloverleafs from the '06. The Federal Premium with these bullets will have to suffice, though overpriced methinks. Only have taken one big muley with this bullet, at 60 yds. and it went boomflop. Bullet exited. I killed a bull moose in northern BC with the 180 grain Gameking from the .300 Win. magnum @ around 300 yds. The bullet traversed both lungs and the bull went about 20 steps before collapse. Post-mortem showed the Gameking bullet had made about six wound channels in an expanding funnel shape from the entrance, and the Indian guy I was with said, "I like that." He's shot more moose than I'll ever see, and the bull was quite dead, so I'm not going to argue. Personal preference - the Gameking is outstanding on Whitetails and Muleys. This is it's perfect application. I prefer a tougher projectile for larger animals such as elk and moose.
Submitted by: Alberta
Have used the Sierra GameKing 100 in the .257weatherby for the past 3yrs with great success at all yardages. Very accurate. Took an 8pt out at 400yds, heart shot. Have taken bucks at 250, 75 and 40yds. No "blow-ups" of the bullet. Small hole in and good exit on far side. Devastating terminal ballistics, granted I did not shoot into the bone except for the 400yd 8pt (I couldnt get the buck to pose for me).
Submitted by: Perferator

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