That's why I thanked. Your comment! Lol
Modernized mosin
- Thread starter crash277
- Start date
That's why I thanked. Your comment! Lol
Thanks! I guess I should send westrifle a PM and let them know they may have mislabeled their surplus 7.62X54r.
-2 deg not much wind I had lots of the surplus so I zeroed with it. Then shot 3rnd groupings at 100yrds. The - numbers is where the ammo shot you can see the surplus ammo was on the bull. The other two shot low and left??? Any SME know why that would happen?
Here's the set up and the targets.
Here's the set up and the targets.
Barrel harmonics. Different bullet weights often shoot to differnt POIs, especially with fairly light-for-length barrels. Sometimes you're lucky and the offset is purely vertical, but other times the offset has a horizontal component as well. Your shortened barrel should be fairly stiff compared to full length and is likely free foated, but this affects all barrels to some extent, however stiff or bedded. Even with its comparatively heavy barrel, my M39 shoots heavy ball to the left of light ball (1.5-2 front sight adjustment dots IIRC) as well as offset notably further vertically, and the 200gr & 203gr SPs a bit further yet. Note that this is effectively independent of the differences in trajectory between the loads.
Regards,
Joel
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Please forgive this question if it's a little off topic but with the Mosin platform is it best to glass bed the whole thing or free float the barrel and perhaps just bed the tang?
That's my question as well. Should I bed the rifle?
Well I guess this thread has ran its course. To answer my own off topic question I found an article where someone recommended both to free float the barrel and bed the tang and in front of the receiver. I don't know where the theory came from for that but I'm going to modernize and acurize a Mosin soon.
I'll post up a seperate thread on it. I'll also take before and after groupings throughout each stage of upgrades.
Bassmaster
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Will be watching, with interest
Yes but you are generally limited to smaller number of shots per group & a longer cool down period between groups.
What's a good group to cool down period ratio?
Experimentation is the only way to find out cause it varies from barrel to barrel. You have been shooting three rnd groups so far so try four then five with the same ammo with a generous cool down period between & see what effect increasing the rnd count per group has. Then you can vary the cool down period till you achieve consistent results with the least time between groups. With a full length barrel three may be the max before you start to see a serious deviation in poi, usually in elevation.
Cool thanks. I will try 4 rnd groups and see what happens.
Update to the modern mosin build. Buddy of mine is a wiz with a lathe and mill. He made me a one of a kind muzzle brake for the mosin.
Just has to be threaded. It will be indexed using the threads so i doubt I will use a second nut to lock it.
Just has to be threaded. It will be indexed using the threads so i doubt I will use a second nut to lock it.
Super cool!
I'm just in the process of putting a muzzle break on my sportized Mosin. I bought mine off of ePay though. It's a .308 break. I have the die to thread the barrel and the .311 guide to make sure it goes on straight but need to borrow a die handle to get the torque to cut it. I don't want to have to buy a large die handle for one cut.
Your break looks soooo much nicer than the el Cheapies one I found on eBay. It's actually pretty hard to get Americans to ship them up to us here in Canada. I did convince one guy though. I had him label it as an "Industrial pipe vent"
Keep us posted on how well it works. I found that since I shortened my barrel the thing kicks like a mule. Lol! I was hoping the break would allow me to stay on target better after each shot.
I'm just in the process of putting a muzzle break on my sportized Mosin. I bought mine off of ePay though. It's a .308 break. I have the die to thread the barrel and the .311 guide to make sure it goes on straight but need to borrow a die handle to get the torque to cut it. I don't want to have to buy a large die handle for one cut.
Your break looks soooo much nicer than the el Cheapies one I found on eBay. It's actually pretty hard to get Americans to ship them up to us here in Canada. I did convince one guy though. I had him label it as an "Industrial pipe vent"
Keep us posted on how well it works. I found that since I shortened my barrel the thing kicks like a mule. Lol! I was hoping the break would allow me to stay on target better after each shot.
