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I have a G11 and and a K11. The G11 shoots well with H380 and a 168gr SMK. I want to use the K11, partially because I have not been able get any H380. I could switch to another powder, I admit, but I would also like to use the K11 because it is lighter. The K11 has been shooting OK with Hornady 150 grain 3031 flat based bullets. I think it could do better with the 168 gr SMK, but my available powders are IMR 3031, 4064 and 4895. There is guidance for using all of these, but I would like to know if anybody has a preference, and why.
Thanks for any help.
 

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4064 has a pretty good following among the swiss shooters and is much more suited to the task than 3031. It is accurate and consistent. I would be pretty careful using the 3031 with even the 150gr bullets. They're pretty light but a lot of smokeless powders have a narrow range where they're safe to use. Get too small of a charge and you can have trouble too. That is one good reason to use something else.

Many of us have been using Reloder 17 with heavier bullets and reloder 15 with lighter ones. Varget is also a good choice and I've heard of guys using IMR4895 too but have never tried it myself.

Frank
 

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Vihta Vuori N160 is a good option. The Hornady manual lists loads for bullets from 150 gr to 178-180 gr using it.
I've gotten excellent results using it with the Berger 175 gr VLD Target bullet.

But good luck finding VV N160.
 

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I owned two K11s and a K31 and was planning on making test loads for them until the house burned down with them. During my research R17 was the closest to the original powder. Ask Swissrifle.com for their advice.
 

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The 7.5x55 case size is between a .308 and a .30-06 so I would guess that IMR 4350 would be good. If you are shooting for range, ask the person who shot his K31 at this range: World Record Attempt Open Sight Shot 2240 yards Ernest Jimenez Unmodified K31 Swiss - 7.5×55mm Swiss - YouTube. I am working up a long-range load for my T99 and am talking to another shooter who shoots long range with his T99. He turns his meplate and it is suppose to improve accuracy.This makes sense for long range. I cast HP bullets and other bullet casters think that if the hex pin is used, it can distort the bullet hole enough on release to affect the balance and group compared to a round pin. Both he and I use the Lee neck sizing collet die because the runout of your bullet will be practically zero. Getting back to powder, ask the members at the Swiss Rifle Club or the shooters on the youtube channel. Their accuracy load might use the powder you have and their load will give you a ballpark idea where your accuracy node is.
 

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It looks like you could use any of these powders.





Starting LoadMaximum Loads
ManufacturerPowderBullet Diam.C.O.LGrs.Vel. (ft/s)PressureGrs.Vel. (ft/s)Pressure
HodgdonBL-C(2)OUT OF STOCK0.308"3.060"39.02,36341.02,404
HodgdonH335BUY NOW0.308"3.060"39.02,35441.02,399
HodgdonH380BUY NOW0.308"3.060"41.02,41443.02,502
HodgdonH414OUT OF STOCK0.308"3.060"42.02,42944.02,519
HodgdonH4350BUY NOW0.308"3.060"44.02,37948.02,524
HodgdonH4831BUY NOW0.308"3.060"45.02,47749.02,578
HodgdonH4895
0.308"
3.060"39.02,38841.02,432
 

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Adding header data (Note it's a long barrel G11 or 96/11 so expect less velocity from K11 and likely shorter COL for K31)
Twist: 1:10.600"
Barrel Length: 31.000"
Trim Length: 2.175"
Bullet Weight 168 GR. SIE HPBT
Case Norma
Primer Winchester LR, Large Rifle


ManufacturerPowderBullet Diam.C.O.LGrs.Vel. (ft/s)PressureGrs.Vel. (ft/s)Pressure
Starting LoadMaximum Loads
HodgdonBL-C(2) Out of Stock 0.308"3.060"39.02,36341.02,404
HodgdonH335 Buy now 0.308"3.060"39.02,35441.02,399
HodgdonH380 Buy now 0.308"3.060"41.02,41443.02,502
HodgdonH414 Out of Stock 0.308"3.060"42.02,42944.02,519
HodgdonH4350 Buy now 0.308"3.060"44.02,37948.02,524
HodgdonH4831 Buy now 0.308"3.060"45.02,47749.02,578
HodgdonH4895 Out of Stock 0.308"3.060"39.02,38841.02,432
 

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Adding header data (Note it's a long barrel G11 or 96/11 so expect less velocity from K11 and likely shorter COL for K31)
Twist: 1:10.600"
Barrel Length: 31.000"
Trim Length: 2.175"
Bullet Weight 168 GR. SIE HPBT
Case Norma
Primer Winchester LR, Large Rifle


ManufacturerPowderBullet Diam.C.O.LGrs.Vel. (ft/s)PressureGrs.Vel. (ft/s)Pressure
Starting LoadMaximum Loads
HodgdonBL-C(2) Out of Stock 0.308"3.060"39.02,36341.02,404
HodgdonH335 Buy now 0.308"3.060"39.02,35441.02,399
HodgdonH380 Buy now 0.308"3.060"41.02,41443.02,502
HodgdonH414 Out of Stock 0.308"3.060"42.02,42944.02,519
HodgdonH4350 Buy now 0.308"3.060"44.02,37948.02,524
HodgdonH4831 Buy now 0.308"3.060"45.02,47749.02,578
HodgdonH4895 Out of Stock 0.308"3.060"39.02,38841.02,432
Not a single one of these powders are available in Europe except H4831[SC].
 
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