185gr. Berrys & XTP w/Titegroup Results & Questions

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pspc271

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I will try not to make this to long, just wanted to post some results and ask a few questions. I am new to reloading so this is all a learning process for me.

First the loads, all were fired threw my FN FNP-45 which has a 5.3 inch barrel. All brass was once fired Speer and Winchester brass and reloaded with Remington Large Pistol Primers. I was shooting from 10 yards standing unsupported.

I originally started with 100 230gr Hornady FMJ RN loaded over 4.6gr of Titegroup. Shot flawlessly and grouped very well. Was very soft shooting, noticeably less recoil than Walmart white box. I had a couple of jams, failure to feed, but attribute that to a possible faulty magazine for the moment.


Next I loaded Berry's 185gr HBRN plated bullets, 10 rounds each at 5.0gr, 5.2gr, 5.4gr, and 5.8gr, all again with Titegroup. I found that at 5.0gr the gun stove piped on every round and shot placement was inconsistent. 5.2-5.8 functioned well but the lower loads were again very soft recoiling. The 5.8gr load produced the tightest grouping and was still very easy to handle.

I then loaded 185gr Hornday XTPs with 5.8 and 6.0gr of Titegroup this time in nickel plated Speer brass. For some reason even though I used the same die setup as I did for the standard speer/ winchester brass most of the Nickel cases would not feed properly but would fire if individually fed. Almost seemed if the bell had not been removed and was hanging the case up. Anyways, it seemed the 5.8gr loading fired the tightest group, recoil was completely manageable and not noticeably different from a factory hollow point.

Unfortunately I do not have a chrono so I feel like I'm missing out on half of the data that I could have gotten from this work up.

Now for the questions.

1. Why do the 230gr FMJs with less powder fire and cycle the gun fine but a lighter bullet with more powder wont?

2. The Hodgen website says a max load for a 185gr bullet with Titegroup should be 5.5gr but the Hornday book say 6.2gr. Why such a big difference and how do I know which is correct or safest?

3. Any idea what my velocity would be for 5.8gr of Titegroup with the both the plated Berry's bullet and the Horandy XTP?

4. Any suggestions for improvement or changes?

I examined all cases and with my limited knowledge/ experience I did not see any signs of over pressure.

Thanks for taking the time to read this and for any comments, suggestions, or recommendations!
 
We need more information to help you.

1. Did you conduct the barrel drop test using a dummy round to determine the Max OAL then function checked feeding/chambering from the magazine to determine the Ideal OAL for each bullet type to ensure reliable feeding/chambering?

2. I use .020" added to the diameter of the bullet for my taper crimp. How much taper crimp did you use for each bullet?

If you have not, I recommend you repeat steps #1 and #2 and reconduct your powder work up.

You should always determine the OAL before conducting the powder work up. That way, you will know a FTF is not related to OAL/taper crimp but insufficient powder charge. ;)
 
Why do the 230gr FMJs with less powder fire and cycle the gun fine but a lighter bullet with more powder wont?
One (230) has enough weight/velocity to do so, and the other (185) does not.

The Berrys 185 Gr HBRN has a lot of case capacity compared to the 230 Gr solid base. It has that hollow to account for. This drops pressures/velocities. Bump up your charge weight as the data allows and the gun will cycle properly at some point.
 
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