Quote...if they hold enough air for his theory to work.Without knowing the volume we can't be sure, but Rick Eustler said about 10cc, which is less than 1/10 cc per FPE, so dumping the air as they are doing now is the only logical solution.... The comment I made about "clipping the air" (using timed dwell) referred to using a much larger reservoir, which is not part of this design....Yes, the same power plant in a dual-caliber gun gets more velocity with the smaller caliber, but more FPE with the larger caliber.... Expecting a 120 FPE gun in .357 to produce that in .257 is, IMO, extremely unlikely.... more like 80-85 FPE.... However, I'm working with so many assumptions I could be wayyyyyyyy off....Bob
...if they hold enough air for his theory to work.
I'm not talking fpe I'm talking fps.Perfect example is when Will take a big bore Korean gun and puts a .257 barrel on one. It is shooting in the low to mid 800's if I remember right. When it was shooting faster with the heavier larger caliber.
At the present time, this is all just speculation, of course.... Once (if) INVT have a production run, sell some guns, and they are tested thoroughly, we will have proof of what they can do.... We should also know at that point if the cartidges are sealed up or can be disassembled, analyzed, and possibly improved to up the FPE at a given pressure.... Once all that is done, then we can play this guessing game about what a smaller (or larger) caliber might do based on facts.... Bob
I personally do not expect a higher fpe from a smaller caliber myself. I cannot see INVT releasing a .257 shooting sub 90-grain boolits at less than 900-fps, but like you, I could be wrong and hope that I am. Only time will tell.Respectfully,Al.(AGW)90 gr at 900 fpe is 161 fpe. That will never happen. A condor will not even come close to that with out one of my valves. Condor pushes 74 gr around 850 fps if your lucky.
Ok let's wait and see.Another example is I took my regulated .25 tank and changed out the stem so it would work for my .30 build. I didn't have a tank setup yet for it..25 shoots .25.4 gr right around 940 fps. On the .30 it shot 45 gr at 920 fps. I shimed it down to shot 905. Yes the barrel is 6" longer on the .30. But there is also a 20 gr difference in weight. Almost doubleYes I have a .257 condor that makes 200 fpe on 3000 psi and 244 fpe on 4000 psi.I normally shoot 74 gr 257420 at 1070 fps. I have a NOE modified mold that drops 67 gr HP. They shoot around 1100 fps with excellent accuracy.
Here is what I have in .257The .257 is really amazing in the condor when done right. Out of the 4 condors I have I would have to say the .257 is the one that impresses me the most. .30 is just as impressive but as a pellet shooter. I went prairie dog hunting last month. I shot one at 190 yds and one at 292 yds with the .257.I also have a .308. It is a little on the violent side because of the recoil. Works good but has to be held right to keep it from jumping.
It's hard to beat the Lyman 257420 regular or HP. I shoot the regular the most. I have shot thousands of them. The 190 yd prairie dog was a HP and I think the 292 yd was also.I just started shooting the NOE 67 gr HP. It seems to do just as good as both lymans. It sure makes a smack at a 100 yds with the large hole it has in it.I haven't been able to go and shoot thru the chrony ant 100 yds yet. I was working out of town this whole week. Might be able to this weekend but if not next weekend for sure.
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