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ronc
Junior Member
Posts: 89
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Post by ronc on Dec 29, 2021 23:01:25 GMT -5
What kind of groups are you getting with the VV110 load? What velocity are you getting? It sounds like a pretty stout load for a small shank barrel and pressures can spike quick with fast powders. I tried VV110 with the 200 XTP in my heavy shank 40 cal but didn't get good groups or the velocity I wanted before they opened up and I didn't go that high. H4198 did get me there...
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mshm99
Junior Member
Posts: 75 
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Post by mshm99 on Dec 30, 2021 21:14:00 GMT -5
Let first say I am a hunter. My weapons are tools. I live by the motto” Beauty is as beauty does”. My trucks have mats ,not carpet. I have hand crank windows. That said no one should take anything I say as gospel , end all, or in any way expert advice. The only thing that can be said is my weapon did not blow up with the loads I fired. Once I find “THE”load I’m done.
I put my .40 together my self with Hanks parts and McGowen Barrel the rest was all Savage110 . Initially, the first 125 rounds or so .40 caliber bullets loaded with out any modification. At some point the barrel was broke in and seating the bullet became way too easy and accuracy fell off. I then started knurling up .001 and everything fell back in place. I reviewed targets dating back to July 2018. The weapon has always shot sub two inch no matter what load. I am OK on the bench rest but I am far from expert . I have decent bench anchored into the ground. That said the current load combo cuts 100 yard clover leafs if I do my part. I’ll have some targets to show in the future.
I have an old as dirt beat up Chrony F1. I took some velocities using some #40040 180gr XTP’s which I bought to have some get to know the weapon fun.
I used an N110/Varget duplex to start. And started straight N110 loads at 39 grains and worked up. I believed the duplex was not getting enough starting pressure to obturate the base of the CEB 165 Maximus. The duplex worked well with the XTP.
I started the N110 testing with the XTP’s. The only N110 velocities I found in my notes was:
43 grains N110---2934,2881,2875
45 grains N110---3105,3066
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Post by sew on Dec 31, 2021 21:00:12 GMT -5
How did you knurl the CEBs? If it’s copper, I anneal it whether it’s a CEB (a must), a non-polymer tipped Barnes or a Hammer. Quicker, more thorough obturation. They all still go all the way through. Annealed is definitely easier to full size.
I’ll run a Quick Load on your load, but expect to see quite a high pressure. What size bushing and type of HIS module? I don’t remember ever loosing accuracy as I get into high pressure regions. Conversely, it seems to get better. Be careful.
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Post by hunter on Dec 31, 2021 21:33:32 GMT -5
Mshm99,
What is your annealing process and do you knurl before or after anealing
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mshm99
Junior Member
Posts: 75
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Post by mshm99 on Jan 1, 2022 14:24:20 GMT -5
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Post by sew on Jan 1, 2022 18:40:22 GMT -5
Without being able to directly measure barrel travel but making a guess of powder/wad/breechplug length subtracted from 26”, i wagged the bullet barrel travel and came up with between, just over 50K and 53Km psi. My calculated velocity was 3023’/sec. Those pressure figures were with barrel friction at 0.4(50K) and not used (53).
My suspicion is that the actual peak pressure is a little less than calculated and the high pressure is maintained a little longer than used in the calculated pressure “curve”. That pressure is still >13K less than a 223 max load. Though I don’t like to shoot heavy loads, I do believe pressure is our friend: it obturates the bullet quicker and more consistently, the powder at closer to its optimal pressure range is generally less temp sensitive, the burn is generally cleaner, and accuracy is usually better.
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mshm99
Junior Member
Posts: 75
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Post by mshm99 on Jan 1, 2022 19:27:58 GMT -5
Thank you Sew for your input. I am grateful for this information.This is in line with nick50471 calculations using the 180gr XTP in the earlier posts. Again ,Thank You
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