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    • #28745
      Anonymous
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      How much can one reduce the diameter with a size die? I know the lube grooves will be compromised but I am going to PC, so that is not the problem. What will the gas check do when reduced that much? Other considerations? I do have AL and Cu gas check in 270. What are your thoughts folks?

      retread

    • #28753
      Goodsteel
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      In my opinion, any more than .005 is causing more problems than it is solving.

    • #28755
      Anonymous
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      That is what I would suspect but I wanted to verify. Thanks Tim. I’ll continue my hunt for a suitable 6.5 mold.

    • #28756
      Goodsteel
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      Well, shooting cast in 6.5 is a difficult thing to do if accuracy is to be maintained along with downrange energy and speed, all this due to the twist rate of the barrel, but if I were to attempt it just for giggles, I would start right here:
      http://www.midwayusa.com/product/946…ette-gas-check

      keep your speed about 1800FPS, cast the best bullets you know how, and try to push softly.
      I would use White Label 2500+ lube.

      personally, I would just stick to jacketed though. When you’re using small diameter bullets with a fast twist rate, the best thing to do is use long bullets and push them fast. That spells jacketed.
      If you don’t do this, you’ll be using short bullets, pushing them slow, and accuracy will suffer as a result as well as useful range of effect.
      Ive decided there are some situations where cast just doesn’t make a whole lot of sense, and I actually try to avoid those situations so I can enjoy the sport more fully.

      That said, I have a few rifles that get no cast bullets, and I have them because the benefits outweigh the cost. Such as:
      300 winmag long range tactical rifle.
      270 Winchester Model 70.
      M1A Scout semi automatic rifle.

      These are all rifles that just work better with jacketed for reasons of twist, or accuracy, or long range performance, or finction of the rifle, or they are less than 30 caliber.

    • #28760
      uber7mm
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      You might want to slug the barrel and/or chamber cast your Arisaka. Military barrels diameters are all over the place. (Especially late war and last ditch models)

    • #28761
      Goodsteel
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      That’s a good idea. Last 6.5 Jap I had was definitely oversize.
      Good catch.

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