XTP/Parker question

[Harley]

Today, from a clean .45 barrel, I fired 12 rounds of 300 gn XTP, sabotless, resized and knurled. They loaded a lot easier than I think they should, but this was my first try at resizing them. (BTW, not the point of the thread, but 53.5 gn H4198 gave me sub-moa at 100 yards.) MV was a little less than 2300 fps.

I did my usual routine between shots: 4 dots of solvent on a patch, followed by one dry patch.

After the 12 XTP's, I fired one 3-shot group with the 275 Parker, using the same load that has always averaged 2307 MV.

They were extremely hard to start and to seat. I was hanging by both hands from my short starter. The 3-shot group averaged about 2385 MV. Group size was much larger than usual.

My question: Does the XTP deposit a lot of jacket in the barrel, keeping in mind that these were resized and knurled? That's the only thing I can think of to account for the difficulty seating the Parker's and the subsequent higher MV.

I can test it simply enough by cleaning the barrel and shooting the Parker; I'm just hoping somebody knows.

Thanks.

Harley

[jeff]

I have shot thousands of 300 grain XTP's from 8-10 ML2's with never noticing any deposit from the bullet, keep in mind the bullet should be in the sabot out the barrel with a possible plastic fouling on a tight barrel from a very hot load, just my experience.
Jeff~

[Harley]

Thanks for the reply, Jeff. It's my error, I'm just tired. I was shooting sabotless. I'll correct my post.

Harley

[smokeeter]

Mar 20, 2009 16:56:19 GMT -5 Harley said:

Today, from a clean .45 barrel, I fired 12 rounds of 300 gn XTP, sabotless, resized and knurled. They loaded a lot easier than I think they should, but this was my first try at resizing them. (BTW, not the point of the thread, but 53.5 gn H4198 gave me sub-moa at 100 yards.) MV was a little less than 2300 fps.

I did my usual routine between shots: 4 dots of solvent on a patch, followed by one dry patch.

After the 12 XTP's, I fired one 3-shot group with the 275 Parker, using the same load that has always averaged 2307 MV.

They were extremely hard to start and to seat. I was hanging by both hands from my short starter. The 3-shot group averaged about 2385 MV. Group size was much larger than usual.

My question: Does the XTP deposit a lot of jacket in the barrel, keeping in mind that these were resized and knurled? That's the only thing I can think of to account for the difficulty seating the Parker's and the subsequent higher MV.

I can test it simply enough by cleaning the barrel and shooting the Parker; I'm just hoping somebody knows.

Thanks.

Harley

Harley, I haven't noticed any appreciable increase of copper with using knurled xtps, ie. loading did not get progressively more difficult with the increase of shots. I fired approx 80 shots today and never cleaned the barrel and never noticed any more difficulty in loading. I do use a veggie wad with my loads if that makes any difference.
A question I have for you, what is the size of your vent liner orifice and what primer are you using, and what plug are us using and is it recessed ?

[Harley]

Smoke, I was using a new home made VL, ~.0305+, CCI Magnum primer, RB-recessed VL BP.

Before today, I have always had consistent seating pressure with the Parkers; today they were just waaay too hard to load. The only difference was the 12 XTP's before them. I did do one thing differently when resizing the Parker's: I used your trick of finishing the resizing by re-running them thru the .450 die. That couldn't be the problem, though, because the most that would do would be to make them smaller, thus EASIER to load, no harder.

Harley

P.S.: Maybe the veggie wads make it work?

[Dave W]

They do not seem to foul any worse for me either. Glad the load shot good for you Harley.

[Harley]

DaveW, I'm not certain, but I think I lifted that load from one of your posts. I also tried 53.0 and 54.0, but the 53.5 was the standout. Thanks.

Harley

[Dave W]

Mar 21, 2009 7:16:39 GMT -5 Harley said:

DaveW, I'm not certain, but I think I lifted that load from one of your posts. I also tried 53.0 and 54.0, but the 53.5 was the standout. Thanks.

Harley

Same for me. Try that load at 200yds if you can and let me know what you get. Speeds were pretty much identical to my gun. What temp did you shoot in also?

[Harley]

DaveW, I was shooting at 53*. Coincidentally, I'm right now cleaning the barrel of yesterday's fouling. I know you and Smokeeter don't report excessive XTP fouling, but I've got to tell you that Bore Tech Eliminator has pulled about 5x the amount of copper from the barrel that I would have gotten from the Parker's.

That certainly could account for the extra hard seating effort and the extra 80 or so fps.

Harley