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What kind of velocity can I expect for 140 grain bullets from a modern action? What about a 22" vs 24" barrel length? | ||
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In a 22" barrel I was getting 2750 fps consistently in a Sako AV and a Winchestewr Mod 70. Best powders were N 160, H 4350 & Re 19. I was also getting 2980 fps with Nosler 125 gr Partitions and 2600 fps with Hornady 160 gr RN bullets. All cases were Lapua or Norma & I used to get minimum 10 reloads with them. Great caliber & very easy to shoot accurately. What is your rifle? "When the wind stops....start rowing. When the wind starts, get the sail up quick." | |||
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I have a very nice G33/40 action and I was thinking of using it to build a 6.5x55 | |||
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Good choice. I use 4831SC max load out of Nosler's latest. Extremely accurate load in my Mk X w/ LW barrel.  Aut vincere aut mori | |||
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Don't overlook RL 22. I have the same two actions as Nakihunter and I too get about 2750 fps and excellent accuracy with an RL 22 load I've worked up. Geronimo | |||
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2750 ,and as much maybe as 2850. A good powder is 4350 .My rifle is a custom M98 .Also part of the equation -mine is throated for the 160 gr.My load gives no sign of pressure ,very accurate ,about 1/2", | |||
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I would start with caution on this cartridge as the SAMMI spec is for the old M96 Mauser action and low pressure. I know that modern actions can take 60,000 PSI loads but the data is a bit mixed. You will need to work p slowly. I believe that if you want 2850 fps with 140 gr bullets, then go for a 7mm08 & be safe. With Mauser actions and longer throats, the seating out of bullets could give you a bit more case capacity & a bit more velocity but I would be very careful and push those boundaries only if I am a really experienced reloader with excellent undrstanding of the risks. The 6.5X55 is a great cartridge and will do all you want it to do as long as you do not try to make it a 270 Win! Actually it is already very close to a 270 WIN with 125 gr or 129 gr bullets. If you use Barnes TSX or TTSX 110 gr or 120 gr bullets, you have a great rifle out to 300 meters plus. Be safe & have fun. "When the wind stops....start rowing. When the wind starts, get the sail up quick." | |||
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I have an old Carl Gustov that shoots 120gr. Sierras into sub nickle(Sierra said they probably wouldn't group due to the twist) size groups. Lapua brass,and a pretty stout load of Norma MRP. When I got it,it sprayed shots and the muzzle looked like it had been cleaned from the muzzle. My Gunsmith cut about 3-4" off and recrowned it and it turned into a shooter. Stepchild NRA Life Member | |||
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What about barrel length.....what do you prefer.....22".....23".....24" | |||
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With modern powders it isn't hard to get very good velocity at pressures that are safe for the old 96 actions. I do it all the time. Careful study of several manuals will reveal whose loads are geared toward modern actions and which aren't. Why go with a 7mm-08 when the .260 is available? You can drive a 140 near 2800 fps. Aut vincere aut mori | |||
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My most used 6.5x55 is 23.6" but I have em as short as 17" and as long as 26" on sporting rifles. 22", 23", 24", flip a coin. Not enough difference to lose sleep over. Nice thing about a 6.5 is that you can build it light enough that a 24" barrel still makes for a lightweight rifle. 22" is always a safe bet. Aut vincere aut mori | |||
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