43-287B
- Thread starter Brad
- Start date
Loaded 30 rounds with 24 gr of H110 for initial testing.
Rick asked me to check for bullet runout. My Sinclair run out gauge shows 1-1.5 thou of runout. Plenty good for this gun. Not sure how much of that is simply variation in the nose of the bullet.
Rick asked me to check for bullet runout. My Sinclair run out gauge shows 1-1.5 thou of runout. Plenty good for this gun. Not sure how much of that is simply variation in the nose of the bullet.
How much runout did you testing show was permissible before it had an adverse effect on accuracy?
I would expect that up to .004 would be fine.
I didn't even run QL data with 2400. I figure that the only powder I may try other than H110 is my small amount of N110. It won't get the speed H110 can but does have a reputation for good accuracy. For the price of the stuff it should be good.
Check run out on the straight wall cartridges for the same reason as bottle neck rifle stuff, the straighter the start the better. On most handgun straight wall stuff it would be a silly waste of time but for long range revolver accuracy as with all loads that are strictly for accuracy little things can mean a lot. Even when squeezing the trigger confidence in all equipment is a help.
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I thought N-110 was free? When in CA for the IHMSA Internationals a year and a half ago I had mentioned that I couldn't even find N-110. The next day a guy shows up with 3 unopened 1 pound jugs and gave them to me. Wouldn't accept a dime for them.
FREE is good.
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Dunno, I didn't test the straight wall ammo per se for accuracy vs run out, I just used the same criteria I did with the bottle neck match ammo. Zero to .001" for shoot-offs. .001" to .003" for the shorter range match and anything much over .003" practice ammo.
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Ian
Notorious member
The extreme long-range rifle competitors say the same thing. If you don't feel 100% warm and fuzzy about your equipment, doubt will affect your trigger squeeze.
You're telling me?
Forecast is for rain tomorrow. Looks like a short window in afternoon with 15% chance so I may see if I can get some range time between showers.
I haven't shot revolver from a bench in a bit so I have lots to relearn. The chrony will tell me a bunch tomorrow too.
Forecast is for rain tomorrow. Looks like a short window in afternoon with 15% chance so I may see if I can get some range time between showers.
I haven't shot revolver from a bench in a bit so I have lots to relearn. The chrony will tell me a bunch tomorrow too.
fiver
Well-Known Member
I hope you don't get the storm we got today.
it started out dark and stayed there all day, and it rained too.
not all day rain but when it did rain it made up for the dry times in between.
I know they shoot a lot of the N-110 in place of 2400 in cast rifle loads in Europe, so it might even be a bit better than H-110 for working up and down loads.
it started out dark and stayed there all day, and it rained too.
not all day rain but when it did rain it made up for the dry times in between.
I know they shoot a lot of the N-110 in place of 2400 in cast rifle loads in Europe, so it might even be a bit better than H-110 for working up and down loads.
Just got home from the range.
I had to shoot sorta quick as we are between storms.
Groups were nothing to write home about but it as more interested in getting on paper, getting some initial chronograph data, and trying to recover a bullet.
Bullet recovery was interesting as we have had lots of rain including much overnight. I fired 5 into a single area on the berm at 100 so I could more easily excavate one.
Recoil was brisk but not horrible.
For 15 shots with the LabRadar I got an average velocity of 1369. High was 1399, low was 1338, spread 61, SD was 14.8.
Chronograph data tells me I need more powder or a different primer, SD should be smaller with much less spread. Primer will be my next change.
Groups had some stringing but I think it was largely shooter induced. Paper plate size groups were easy but I want poker chip sized groups.
Recovered bullet lost less than 20 gr. Considering that includes lube and the gas check it didn't lose much at all. This was air cooled and 14 BHn. I think heat treating to 18 BHn might help too. Notice that the lube groove and crimp groove are totally goals note that the rifling definitely extends the length of the nose as desired.
A good start point. I want to compare the load to QL and get an estimate on pressure. My range set up needs some work. That is going to take a little thinking.
I had to shoot sorta quick as we are between storms.
Groups were nothing to write home about but it as more interested in getting on paper, getting some initial chronograph data, and trying to recover a bullet.
Bullet recovery was interesting as we have had lots of rain including much overnight. I fired 5 into a single area on the berm at 100 so I could more easily excavate one.
Recoil was brisk but not horrible.
For 15 shots with the LabRadar I got an average velocity of 1369. High was 1399, low was 1338, spread 61, SD was 14.8.
Chronograph data tells me I need more powder or a different primer, SD should be smaller with much less spread. Primer will be my next change.
Groups had some stringing but I think it was largely shooter induced. Paper plate size groups were easy but I want poker chip sized groups.
Recovered bullet lost less than 20 gr. Considering that includes lube and the gas check it didn't lose much at all. This was air cooled and 14 BHn. I think heat treating to 18 BHn might help too. Notice that the lube groove and crimp groove are totally goals note that the rifling definitely extends the length of the nose as desired.
A good start point. I want to compare the load to QL and get an estimate on pressure. My range set up needs some work. That is going to take a little thinking.
Ian
Notorious member
My goodness. Shot the grooves right off of it! Never seen that before, I'm inclined to say you are WAY over pressure for the alloy. A little bump is good, but you're shooting Silly Putty. Didn't Rick mention 18BHN??
Six feet of rubber garden mulch put in cardboard boxes lined up in a row should be manageable and effective for at least slowing the bullets down enough to find in the berm.
Quickload is always optimistic by around 50-100 fps for me with revolvers due to cylinder gap losses.
Six feet of rubber garden mulch put in cardboard boxes lined up in a row should be manageable and effective for at least slowing the bullets down enough to find in the berm.
Quickload is always optimistic by around 50-100 fps for me with revolvers due to cylinder gap losses.
Shhhh, don't remind him. He kinda likes to nag a bit.....
Will try to cast more in the next few days, get them sized, then heat treated. An hour at 425 should make a difference.
I have never had the grooves disappear either. There was no leading but antimony wash is evident at the muzzle. I have a feeling a BHn change will make a difference.
Will try to cast more in the next few days, get them sized, then heat treated. An hour at 425 should make a difference.
I have never had the grooves disappear either. There was no leading but antimony wash is evident at the muzzle. I have a feeling a BHn change will make a difference.
Didn't Rick mention 18BHN??
Quickload is always optimistic by around 50-100 fps for me with revolvers due to cylinder gap losses.
I've kept track, would you like to know how many times? Brad seems to take suggestions slowly but instead of more powder try less with that alloy. I'll guess less powder looking at the bullet but since you didn't post the load????
He should be getting less pressure loss and an increase in velocity if these bullets are sized to the throats correctly, little pressure loss until the bullet is well into the rifling and clear of the front of the throat.
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