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Posted: 5/18/2010 4:33:15 PM EDT
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I am sure this has been discussed extensively before, but could you people give me some direction
on this problem: I purchased some Hornady 75 gr bthp Match bullets for my AR-15. The OAL listed in my Lyman manual is 2.390". The OAL that the magazine will accept is significantly less. I have read instruction stating to load to the max that the magazine will allow and go with that. A question does arise using this method though: Using the amount of powder listed at 2.390" (varget 2.30-2.56gr), then seating the new OAL with the same amount of powder, won't the shorter length cause pressure problems ? Some detailed instruction would be much appreciated. thank you , Nost. |
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My reloading manuals all say 2.260 max OAL for the .223, which will fit into a magazine. If you are working up a load, start by dropping the max load listed by 10% and working up.
For those bullets, load to mag length and work up until you get your desired results. |
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Quoted:
I purchased some Hornady 75 gr bthp Match bullets for my AR-15. The OAL listed in my Lyman manual is 2.390". Incorrect. The 2.390" OAL length is for the Hornady 75 grain A-MAX bullet, not the 75 grain BTHP. Find a manual that lists loads for the BTHP bullet. |
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Quoted:
I am sure this has been discussed extensively before, but could you people give me some direction on this problem: I purchased some Hornady 75 gr bthp Match bullets for my AR-15. The OAL listed in my Lyman manual is 2.390". The OAL that the magazine will accept is significantly less. I have read instruction stating to load to the max that the magazine will allow and go with that. A question does arise using this method though: Using the amount of powder listed at 2.390" (varget 2.30-2.56gr), then seating the new OAL with the same amount of powder, won't the shorter length cause pressure problems ? Some detailed instruction would be much appreciated. thank you , Nost. I tihnk you are using data for A_MAX |
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Quoted:
I am sure this has been discussed extensively before, but could you people give me some direction on this problem: I purchased some Hornady 75 gr bthp Match bullets for my AR-15. The OAL listed in my Lyman manual is 2.390". The OAL that the magazine will accept is significantly less. I have read instruction stating to load to the max that the magazine will allow and go with that. A question does arise using this method though: Using the amount of powder listed at 2.390" (varget 2.30-2.56gr), then seating the new OAL with the same amount of powder, won't the shorter length cause pressure problems ? Some detailed instruction would be much appreciated. thank you , Nost. Do not ever plan on compressing a round to make it shorter after loading. Figure it out first to be a safe round of the right size. This is elementary loading knowledge. If I were you, I'd sell any loading equipment and supplies before I blew myself up. |
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Incorrect. The 2.390" OAL length is for the Hornady 75 grain A-MAX bullet, not the 75 grain BTHP. Find a manual that lists loads for the BTHP bullet. Yes, you are right, the 75gr in the Lyman manual is for the A-Max. But these bullets appear to be the same as mine, also in the Lyman manual: 69 gr. Jacketed HPBT COL = 2.260" 77 gr. Jacketed HPBT COL = 2.260" 69 gr. Jacketed HPBT COL = 2.550" Wouldn't you think I could use the load for the 77 gr Jacketed HPBT and get away with it???, it has a 2.260" OAL Question: are there safety issues with seating a bullet to 2.260" OAL? The bullet is well into the case. Not an expert, Nostradamus |
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