Recent content by Doom

  1. Doom

    Equipment To Get Started Reloading Rifle Ammo For Less Than $230

    Don't have one but have used one when I first started reloading. About the only real issues with any press would show in in case concentricity until you get to the 50 BMG presses. Any D or O style press is going to handle any cartridge well until you get to the specialty cartridges like the...
  2. Doom

    Bullet seating tests in vain with Semi-automatic AR-10

    The amount of bearing surface absolutely influences the amount of force required to move a bullet. It's easy to demonstrate if you have an impact bullet puller. Seat on with a short bearing surface ( .25 x caliber) in the mouth and one at 1 caliber and try getting the bullet out!
  3. Doom

    Equipment To Get Started Reloading Rifle Ammo For Less Than $230

    I would recommend steering away from the Lee hand press if possible. It's a good piece of equipment but is hard on the hand.
  4. Doom

    Load development help?

    I don't say anything about the rifle being old. I didn't say anything about generic but yes, it's a wood stock, probably not even pillar bedded. As for 5 shots, taking 6 minutes between shots tends to open up the groups making the group noise than the load. It appears the OP is doing a pretty...
  5. Doom

    Optimum barrel time: great theory or bunk?

    Thanks for the info. I spent 43 years in Engineering running all sorts of modeling programs and even building a few so I am very familiar with garbage in/garbage out.
  6. Doom

    Load development help?

    I'm saying the rifle may be capable of 1/2 MOA at 100 yds and that would be my expectation, not less. The rifle may not be capable of doing that well. It doesn't need to be 5 shots. It's a 7-1/2 lb hunting rifle. Precision is not key to the game here. The first shot is the most important and...
  7. Doom

    Optimum barrel time: great theory or bunk?

    I used OCW for years before looking at GRT and one of the things that drove me crazy was finding the low 43ish 308 load and then finding a load at 43.8gn which didn't make sense because it should have been a scatter node. When I started using GRT I decided to test my OCW loads and model the...
  8. Doom

    Optimum barrel time: great theory or bunk?

    Regardless of the development process that we as reloaders undertake there are some things that are never consistent. Between different shooters there are differences in ability and and shot to shot variations in the shooter's setup and the rifles themselves are different. Within a givern...
  9. Doom

    .308 Winchester

    So what is wrong with Sierra's answer?
  10. Doom

    Load development help?

    Those groups look good considering the rifle. You need to move the groups off the bull when doing load development. There are several reasons. First is you will shoot your aim point away so raise the scope a 1/2 to 1 MOA. The second reason is you mind will see the POA (bull) and the groups...
  11. Doom

    Optimum barrel time: great theory or bunk?

    The barrel velocity in the vibration cycle changes in the horizontal and vertical dimension so that there are periods where the barrel is moving slowly as opposed to periods when it is moving fast. This is the theory behind harmonics and vibrations such as node 1. In Chris Longs theory it's...
  12. Doom

    Seating depth with new and once fired brass

    I'll give a slightly different idea. Keep the same CBTO and see how it shoots. Then work any issues from there. There are several other variables at play but it is best to use fired brass as your basis.
  13. Doom

    Getting started, need a little guidance

    @slythy, I take it from your posts you are looking for precision not accuracy. Just what level of precision are you looking for? What level do you need?
  14. Doom

    Ludicrous speed

    How are you measuring powder?
  15. Doom

    Ludicrous speed

    20" barrel at 42.5n I would expect to be around 2500-2550 fps. 5 gn less would would be roughly 250-300 less so that's in the ball park. Sierra list 2500 in a 24" barrel with 40.9 so 3 rn less is about 2320 fps and 4" is about another 100 fps for 2220 fps. Unless something has changed...
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