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Post by barrycuda on Sept 9, 2019 11:00:53 GMT -5
Long time member but it's been a while since I have posted here. I have a question about the LRMP ignition system vs the good ole 209 plug. At 65 years young I want to build one more (I've said this before) SML. I can see the need for the LRMP system when building off of a rifle action but when using a 700 ML action is there a clear advantage? Need help answering this question so I can finish my parts list. Thanks.
Barry
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Post by dannoboone on Sept 9, 2019 12:01:49 GMT -5
I have the LRMP (PR Bullet) system on a 10MLII and 209 on a
Rem700ML. Many caution that one should shoot neither with
hot rod loads since there is no locking lugs for a double
safety factor in the event threads on the BP fail. I keep
loads under 45,000psi which allows speeds in the 2800fps
range using 275gr bullets. I do duplex, but only for reasons
of accuracy and ignition.
At least with these two rifles, I have not experienced an
advantage of one system over the other.
My advice though, is make sure to get tungsten carbide
bushing plugs and forget worries about how big the hole
is getting with a few shots in the vent liners!
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Post by BuckDoeHunter on Sept 9, 2019 19:09:21 GMT -5
Last time I looked, these images weren't blurry, this a photo bucket thing now? This post by Bestill showed 209 and LRMP side by side with breech plugs having similar dimensions. Too bad the pics don't show, at least the discussion is good to read dougsmessageboards.proboards.com/thread/19785/ignition-test |
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Post by GMB54-120 on Sept 11, 2019 12:06:08 GMT -5
There is no performance advantage in that type of action. Both need a larger volume flash channel to limit pressure on the module or 209 unless you have locking lugs. The only advantage is LRMP is easier on flash holes and build less carbon in the flash channel. When you move up to a lugged or steel brake action you can reduce the volume (shorter flame path) and increase the pressure.
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Post by jpw on Sept 12, 2019 12:33:20 GMT -5
Having both I prefer the LRMP in the 700ml action. You will get a better seal with less wear on your bolt retention screw. A crush fit is not required with the lrmp.
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Post by jeromey on Sept 15, 2019 9:15:12 GMT -5
X2 on the retention screw wear. I will likely change my 700ML to LRMP one day to reduce the wear. The original screw burred up the bolt as well making it very stiff. Having both I prefer the LRMP in the 700ml action. You will get a better seal with less wear on your bolt retention screw. A crush fit is not required with the lrmp. |
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Post by billyboy on Sept 16, 2019 14:35:32 GMT -5
X2 on the retention screw wear. I will likely change my 700ML to LRMP one day to reduce the wear. The original screw burred up the bolt as well making it very stiff. I just had the Bolt Retention Screw develop a a burr on the Bolt Slot on one of my Rem 700 MLS’s this past Friday 13th! Luckily I had a backup ready for opening day & managed to get my Buck on Sunday  That Bolt Retention Screw needs well lubricated & replaced periodically. |
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That Bolt Retention Screw needs well lubricated & replaced periodically.