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Post by BuckDoeHunter on Nov 22, 2019 13:49:17 GMT -5
I should have been out bowhunting but I couldn't pass up a perfect morning for load/chrono work. No wind and temp. at 19*F when I started and finished at 21*F. Four rifles were checked and only one was somewhat disappointing, my Camo Apex usually shoots better but maybe it was just me. Sometimes Barnes TEZs will give you a flyer, I think it is the hardness of that particular bullet but I don't know because these weren't sized. 3 shot groups. Each rifle was shot once then the next one shot. All rifles are smokeless 45 cal. The TEZs were from pack to bore with a heavy knurl, the BCBs were given a heavy knurl then FF sized. Avg. muzzle velocity'sBlack Apex 2582 Camo Apex 2564 (all 3 shots were 2564 for a 0 ES, I had to double check my #'s and all are correct) Red RemBrux 2665 Grey RemBrux 2673  |
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Post by jims on Nov 22, 2019 22:05:12 GMT -5
Shooting well.
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Post by dannoboone on Nov 23, 2019 12:56:40 GMT -5
Assuming you are a bit disappointed with the Camo Apex group:
There was a time a lot of us were beating ourselves up attempting
to get sub-inch groups. Ozark made a point which has stuck with
me, in saying that even with a 1 1/2" group, one's POI will be
3/4" within POA. Even though such a group will not win any paper
punching contests, a deer will not know the difference.
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Post by BuckDoeHunter on Nov 23, 2019 13:31:13 GMT -5
Assuming you are a bit disappointed with the Camo Apex group: There was a time a lot of us were beating ourselves up attempting to get sub-inch groups. Ozark made a point which has stuck with me, in saying that even with a 1 1/2" group, one's POI will be 3/4" within POA. Even though such a group will not win any paper punching contests, a deer will not know the difference. Very true, it just surprised me when it did this 3 shot group in the past, but that was with a duplex load, I may have to go back to that duplex load and see.  |
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Post by ET on Nov 23, 2019 14:06:00 GMT -5
I should have been out bowhunting but I couldn't pass up a perfect morning for load/chrono work. No wind and temp. at 19*F when I started and finished at 21*F. Four rifles were checked and only one was somewhat disappointing, my Camo Apex usually shoots better but maybe it was just me. Sometimes Barnes TEZs will give you a flyer, I think it is the hardness of that particular bullet but I don't know because these weren't sized. 3 shot groups. Each rifle was shot once then the next one shot. All rifles are smokeless 45 cal. The TEZs were from pack to bore with a heavy knurl, the BCBs were given a heavy knurl then FF sized. Avg. muzzle velocity'sBlack Apex 2582 Camo Apex 2564 (all 3 shots were 2564 for a 0 ES, I had to double check my #'s and all are correct) Red RemBrux 2665 Grey RemBrux 2673 Thanks for sharing that nicely organized load and target info. Ed |
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Post by dannoboone on Nov 24, 2019 11:13:18 GMT -5
After discovering the accuracy enhancement of SANE duplex loads,
mainly N110 as the primer powder, I set up for them and never
looked back.
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Post by sw on Nov 25, 2019 8:32:37 GMT -5
After discovering the accuracy enhancement of SANE duplex loads, mainly N110 as the primer powder, I set up for them and never looked back. I am convinced that duplex helps with early obturation and shortening the initial pressure rise time. For me, VV110 is the best primer powder. Unless I’m using a single powder charge of VV110, I duplex with VV110 as the primer powder. This is all based on 209 usage. I’ll soon have a HIS ignition system on a 45 Rem/Brux. I still expect to use VV110/H4198 but will test to see if the duplex is needed. My guess: 5g VV110 under 55-65 H4198 with testing both 275 and 300g bullets. Thoughts, recommendations? |
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Post by jims on Nov 25, 2019 8:48:05 GMT -5
I would think that would be a good starting point, will be interested in following the results. I use 4759 as my starter generally, only because I have much more of it than 110 and that is hard for me to get locally. The little I use I guess I could just use my 110. Do use it in my ULA .50.
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Post by ET on Nov 25, 2019 11:05:59 GMT -5
After discovering the accuracy enhancement of SANE duplex loads, mainly N110 as the primer powder, I set up for them and never looked back. I am convinced that duplex helps with early obturation and shortening the initial pressure rise time. For me, VV110 is the best primer powder. Unless I’m using a single powder charge of VV110, I duplex with VV110 as the primer powder. This is all based on 209 usage. I’ll soon have a HIS ignition system on a 45 Rem/Brux. I still expect to use VV110/H4198 but will test to see if the duplex is needed. My guess: 5g VV110 under 55-65 H4198 with testing both 275 and 300g bullets. Thoughts, recommendations? I believe you're on the right track of shortening Rise Time for better obturation. That would require increasing VV110 and lowering 4198 for the start of testing. Ed |
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Post by sw on Nov 25, 2019 11:18:45 GMT -5
Ed,
I will. The reason of 5g initially is the hotter ignition on the HIS system causes a faster pressure rise than the 209 system and lower than DI. If this were a 209 ignited rifle, I’d have put 10 instead of 5.
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Post by ET on Nov 25, 2019 12:25:33 GMT -5
Ed, I will. The reason of 5g initially is the hotter ignition on the HIS system causes a faster pressure rise than the 209 system and lower than DI. If this were a 209 ignited rifle, I’d have put 10 instead of 5. I understand your reasoning but if these loads are sabot-less and obturation is the goal then shortening the rise time should help accomplish this even with hotter ignition systems. Saboted loads are another story. Ed |
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Post by sw on Nov 25, 2019 18:14:59 GMT -5
👍
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